diff --git a/include/game_options.h b/include/game_options.h
index 73f320bf0..e01506673 100644
--- a/include/game_options.h
+++ b/include/game_options.h
@@ -42,11 +42,15 @@ enum windowColor
     NUM_WINDOW_COLORS,
 };
 
+enum GameControls
+{
+    CONTROLS_GBA,
+    CONTROLS_DS,
+};
+
 // size: 0x10
 typedef struct GameOptions
 {
-    // TODO: find where Controls/Touch Screen are in this structure in PMD Blue
-
     /* 0x0 */ u8 dungeonSpeed;
     /* 0x1 */ u8 FarOffPals;
     /* 0x2 */ bool8 damageTurn;
@@ -54,8 +58,8 @@ typedef struct GameOptions
     /* 0x4 */ u8 mapOption;
     /* 0x5 */ u8 fill5[3];
     /* 0x8 */ u8 windowColor;
-    /* 0x9 */ u8 unk9; // maybe Controls?
-    /* 0xA */ u8 unkA; // maybe Touch Screen?
+    /* 0x9 */ u8 controls; // DS only
+    /* 0xA */ bool8 touchScreen; // DS only
     /* 0xB */ u8 playerGender;
     /* 0xC */ u8 unkC;
 } GameOptions;
@@ -63,9 +67,9 @@ typedef struct GameOptions
 extern GameOptions *gGameOptionsRef;
 
 GameOptions *GetGameOptions(void);
-bool8 GameOptionsNotChange(GameOptions *);
+bool8 GameOptionsNotChange(GameOptions *newOptions);
 void InitializeGameOptions(bool8 initializeGender);
 void LoadGameOptions(void);
 void SetWindowBGColor(void);
 
-#endif // GUARD_GAME_OPTIONS_H
\ No newline at end of file
+#endif // GUARD_GAME_OPTIONS_H
diff --git a/src/code_8012A18.c b/src/code_8012A18.c
index 0c30d3175..5c1553b56 100644
--- a/src/code_8012A18.c
+++ b/src/code_8012A18.c
@@ -13,7 +13,7 @@ void sub_8012A18()
 {
     UpdateSoundEffectCounters();
     DrawDialogueBoxString();
-    nullsub_8(gGameOptionsRef->unkA);
+    nullsub_8(gGameOptionsRef->touchScreen);
     sub_8005180();
     sub_80060EC();
     WaitForNextFrameAndAdvanceRNG();
diff --git a/src/code_809C5C4.c b/src/code_809C5C4.c
index 3b7034290..b092846ed 100644
--- a/src/code_809C5C4.c
+++ b/src/code_809C5C4.c
@@ -4,7 +4,12 @@
 #include "game_options.h"
 #include "event_flag.h"
 #include "ground_main.h"
+#include "ground_place.h"
 #include "code_80A26CC.h"
+#include "constants/ground_map.h"
+#include "constants/friend_area.h"
+
+// This file effectively does nothing on GBA.
 
 struct unkStruct_3001B68
 {
@@ -16,47 +21,48 @@ struct unkStruct_3001B68
      u8  unkD;
      u8  unkE;
      u32 unk10;
-     s16 unk14;
-     s16 unk16;
-     u8  unk18;
+     s16 mapId;
+     s16 groundPlaceId;
+     u8  friendAreaId;
      u8  unk19;
      u32 unk1C;
      u8  unk20;
 };
 
-static IWRAM_INIT struct unkStruct_3001B68 *gUnknown_3001B68 = {NULL};
+static IWRAM_INIT struct unkStruct_3001B68 *sUnknown_3001B68 = {NULL};
 
 UNUSED static const u8 sUnused[4] = {0};
 
-void sub_809C63C();
-u8 sub_809C740(void);
-void nullsub_107();
-void nullsub_108();
-void nullsub_109();
-void nullsub_110();
-void nullsub_111();
-void nullsub_112();
-void nullsub_113();
-void nullsub_114();
-void nullsub_115();
-void nullsub_116();
+bool8 sub_809C740(void);
+void sub_809C63C(void);
+
+static void nullsub_107();
+static void nullsub_108();
+static void nullsub_109();
+static void nullsub_110();
+static void nullsub_111();
+static void nullsub_112();
+static void nullsub_113();
+static void nullsub_114();
+static void nullsub_115();
+static void nullsub_116();
 
 void sub_809C5C4(void)
 {
-    gUnknown_3001B68 = MemoryAlloc(sizeof(struct unkStruct_3001B68), 6);
-    gUnknown_3001B68->unk0 = 0;
-    gUnknown_3001B68->unk4 = 0;
-    gUnknown_3001B68->unk8 = 0;
-    gUnknown_3001B68->unkA = 0;
-    gUnknown_3001B68->unkD = 0;
-    gUnknown_3001B68->unkE = 0;
-    gUnknown_3001B68->unk10 = 0;
-    gUnknown_3001B68->unk14 = 0xffff;
-    gUnknown_3001B68->unk16 = 0x23;
-    gUnknown_3001B68->unk18 = 0;
-    gUnknown_3001B68->unk19 = 0x3f;
-    gUnknown_3001B68->unk1C = 0;
-    gUnknown_3001B68->unk20 = 0;
+    sUnknown_3001B68 = MemoryAlloc(sizeof(struct unkStruct_3001B68), 6);
+    sUnknown_3001B68->unk0 = 0;
+    sUnknown_3001B68->unk4 = 0;
+    sUnknown_3001B68->unk8 = 0;
+    sUnknown_3001B68->unkA = 0;
+    sUnknown_3001B68->unkD = 0;
+    sUnknown_3001B68->unkE = 0;
+    sUnknown_3001B68->unk10 = 0;
+    sUnknown_3001B68->mapId = -1;
+    sUnknown_3001B68->groundPlaceId = GROUND_PLACE_DIRECTION;
+    sUnknown_3001B68->friendAreaId = 0;
+    sUnknown_3001B68->unk19 = 0x3f;
+    sUnknown_3001B68->unk1C = 0;
+    sUnknown_3001B68->unk20 = 0;
     nullsub_107();
     sub_809C63C();
 }
@@ -66,20 +72,19 @@ void sub_809C618(void)
     sub_809C63C();
     nullsub_107();
     nullsub_108();
-    MemoryFree(gUnknown_3001B68);
-    gUnknown_3001B68 = NULL;
+    FREE_AND_SET_NULL(sUnknown_3001B68);
 }
 
 void sub_809C63C(void)
 {
     nullsub_108();
-    gUnknown_3001B68->unk1C = 0;
-    gUnknown_3001B68->unk20 = 0;
+    sUnknown_3001B68->unk1C = 0;
+    sUnknown_3001B68->unk20 = 0;
 }
 
 void sub_809C658(void)
 {
-    switch(gUnknown_3001B68->unkA) {
+    switch(sUnknown_3001B68->unkA) {
         case 3:
             nullsub_111();
             nullsub_112();
@@ -108,10 +113,9 @@ void sub_809C658(void)
 
 void sub_809C6CC(u16 param_1)
 {
-    if(gUnknown_3001B68->unk8 != param_1)
-    {
-        gUnknown_3001B68->unk8 = param_1;
-        gUnknown_3001B68->unkE = 0;
+    if (sUnknown_3001B68->unk8 != param_1) {
+        sUnknown_3001B68->unk8 = param_1;
+        sUnknown_3001B68->unkE = 0;
     }
 }
 
@@ -130,139 +134,137 @@ void sub_809C6EC(void)
     }
 }
 
-u16 sub_809C724(void)
+UNUSED static u16 sub_809C724(void)
 {
-    return gUnknown_3001B68->unk8;
+    return sUnknown_3001B68->unk8;
 }
 
-u8 sub_809C730(void)
+bool8 sub_809C730(void)
 {
-   return sub_809C740();
+    return sub_809C740();
 }
 
-u8 sub_809C740(void)
+bool8 sub_809C740(void)
 {
-  if(gUnknown_3001B68->unk0 == 0)
-        return 1;
-  else
-        return 0;
+    if (sUnknown_3001B68->unk0 == 0)
+        return TRUE;
+    else
+        return FALSE;
 }
 
 // Called in a number of places, like when the player changes the team leader in sub_80278B4().
 void nullsub_104(void)
-{ }
+{
+
+}
 
 void sub_809C760(void)
 {
-    gUnknown_3001B68->unkE = 1;
+    sUnknown_3001B68->unkE = 1;
 }
 
-void sub_809C770(s16 param_1, s16 param_2)
+void sub_809C770(s16 mapId_, s16 groundPlaceId_)
 {
-    u8 uVar2;
+    u8 friendAreaId;
     u8 uVar3;
     s32 iVar5;
     u32 uVar6;
+    s32 mapId = mapId_;
+    s32 groundPlaceId = groundPlaceId_;
 
-    s32 param_1_s32;
-    s32 param_2_s32;
-
-    param_1_s32 = param_1;
-    param_2_s32 = param_2;
-
-    if (gUnknown_3001B68->unkE != 0) {
-        gUnknown_3001B68->unkE = 0;
+    if (sUnknown_3001B68->unkE != 0) {
+        sUnknown_3001B68->unkE = 0;
         return;
     }
-    if (gUnknown_3001B68->unk8 == 0) {
+    if (sUnknown_3001B68->unk8 == 0) {
         sub_809C6EC();
     }
-    uVar2 = gUnknown_3001B68->unk18;
-    uVar3 = gUnknown_3001B68->unk19;
-    switch(param_2_s32) {
-        case 9:
-            uVar2 = MapIdToFriendAreaId(param_1_s32);
-            if (uVar2 == 0) {
+    friendAreaId = sUnknown_3001B68->friendAreaId;
+    uVar3 = sUnknown_3001B68->unk19;
+    switch (groundPlaceId) {
+        case GROUND_PLACE_FRIEND_AREAS:
+            friendAreaId = MapIdToFriendAreaId(mapId);
+            if (friendAreaId == FRIEND_AREA_NONE) {
                 return;
             }
             uVar6 = 1;
             break;
-        case 0:
-        case 1:
-        case 2:
-        case 3:
-        case 4:
-        case 5:
-        case 6:
-        case 7:
-        case 8:
-        case 10:
-        case 0xb:
+        case GROUND_PLACE_SQUARE:
+        case GROUND_PLACE_SQUARE_2:
+        case GROUND_PLACE_POKEMON_SQUARE:
+        case GROUND_PLACE_WHISCASH_POND:
+        case GROUND_PLACE_PELIPPER_POST_OFFICE:
+        case GROUND_PLACE_PELIPPER_POST_OFFICE_INSIDE:
+        case GROUND_PLACE_MAKUHITA_DOJO:
+        case GROUND_PLACE_MAKUHITA_DOJO_INSIDE:
+        case GROUND_PLACE_LUMINOUS_CAVE:
+        case GROUND_PLACE_TEAM_BASE:
+        case GROUND_PLACE_TEAM_BASE_INSIDE:
             uVar6 = 1;
-            uVar2 = 0;
+            friendAreaId = FRIEND_AREA_NONE;
             break;
-        case 0x23:
-            switch((s16)(param_1_s32)) {
-                case 0xA4:
-                case 0xA5:
-                case 0xA8:
-                case 0xA9:
-                case 0xAA:
-                case 0xAE:
-                case 0xAF:
-                case 0xB0:
-                case 0xB1:
+        case GROUND_PLACE_DIRECTION:
+            switch((s16)(mapId)) {
+                case MAP_FUGITIVES_FISSURE:
+                case MAP_FUGITIVES_FIRE:
+                case MAP_FUGITIVES_SNOW_ROAD:
+                case MAP_FUGITIVES_SNOW_FOREST:
+                case MAP_FUGITIVES_BLIZZARD_ROAD:
+                case MAP_NIGHTMARE:
+                case MAP_NIGHT_SKY_1:
+                case MAP_NIGHT_SKY_2:
+                case MAP_THE_END:
                     uVar6 = 0;
                     break;
                 default:
                     return;
             }
             break;
-        case 0x24:
-        case 0x25:
-        case 0x26:
+        case GROUND_PLACE_NEW_GAME:
+        case GROUND_PLACE_SCENE:
+        case GROUND_PLACE_INVALIDITY:
             uVar6 = 0;
             break;
         default:
-            switch((s16)(param_2_s32 - 0xc)) {
-                case 1:
+            switch((s16)(groundPlaceId)) {
+                case GROUND_PLACE_TINY_WOODS:
                     iVar5 = 0;
                     break;
-                case 6:
-                case 7:
+                case GROUND_PLACE_MT_THUNDER:
+                case GROUND_PLACE_MT_THUNDER_MID:
                     iVar5 = 7;
                     break;
-                case 8:
-                case 9:
+                case GROUND_PLACE_GREAT_CANYON:
+                case GROUND_PLACE_HILL_OF_THE_ANCIENTS:
                     iVar5 = 9;
                     break;
-                case 10:
+                case GROUND_PLACE_LAPIS_CAVE:
                     iVar5 = 10;
                     break;
-                case 0xc:
-                case 0xd:
+                case GROUND_PLACE_MT_BLAZE:
+                case GROUND_PLACE_MT_BLAZE_MID:
                     iVar5 = 0xb;
                     break;
-                case 0xe:
-                case 0xf:
+                case GROUND_PLACE_FROSTY_FOREST:
+                case GROUND_PLACE_FROSTY_CLEARING:
                     iVar5 = 0xd;
                     break;
-                case 0x10:
-                case 0x11:
+                case GROUND_PLACE_MT_FREEZE:
+                case GROUND_PLACE_MT_FREEZE_MID:
                     iVar5 = 0xf;
                     break;
-                case 0x12:
-                case 0x13:
+                case GROUND_PLACE_MAGMA_CAVERN:
+                case GROUND_PLACE_MAGMA_CAVERN_MID:
                     iVar5 = 0x11;
                     break;
-                case 0x14:
-                case 0x15:
+                case GROUND_PLACE_SKY_TOWER:
+                case GROUND_PLACE_SKY_TOWER_MID:
                     iVar5 = 0x13;
                     break;
-                case 0x16:
+                case GROUND_PLACE_WESTERN_CAVE:
                     iVar5 = 0x20;
                     break;
-                case 0:
+                case GROUND_PLACE_DUNGEON:
                 default:
                     iVar5 = (s16)GetScriptVarValue(NULL,DUNGEON_ENTER);
                     break;
@@ -275,70 +277,70 @@ void sub_809C770(s16 param_1, s16 param_2)
             uVar6 = 2;
             break;
     }
-    if (gUnknown_3001B68->unk10 != uVar6) {
-        gUnknown_3001B68->unk0 = 2;
-        gUnknown_3001B68->unkC = 1;
-        gUnknown_3001B68->unk20 = 1;
+
+    if (sUnknown_3001B68->unk10 != uVar6) {
+        sUnknown_3001B68->unk0 = 2;
+        sUnknown_3001B68->unkC = 1;
+        sUnknown_3001B68->unk20 = 1;
     }
-    else
-    {
+    else {
         if (uVar6 == 1) {
-            if ((uVar2 != gUnknown_3001B68->unk18) ||
-                (gUnknown_3001B68->unk14 != param_1_s32)) {
-                gUnknown_3001B68->unkC = 1;
-                gUnknown_3001B68->unk20 = 1;
+            if (friendAreaId != sUnknown_3001B68->friendAreaId || sUnknown_3001B68->mapId != mapId) {
+                sUnknown_3001B68->unkC = 1;
+                sUnknown_3001B68->unk20 = 1;
             }
             else {
-                if ((uVar2 == 0) && (gUnknown_3001B68->unk16 != param_2_s32)) {
-                    gUnknown_3001B68->unkC = 1;
+                if (friendAreaId == FRIEND_AREA_NONE && sUnknown_3001B68->groundPlaceId != groundPlaceId) {
+                    sUnknown_3001B68->unkC = 1;
                 }
             }
         }
-        else if ((uVar6 == 2) &&
-            ((uVar3 != gUnknown_3001B68->unk19 || (gUnknown_3001B68->unk16 != param_2_s32))))
+        else if (uVar6 == 2 &&
+            (uVar3 != sUnknown_3001B68->unk19 || (sUnknown_3001B68->groundPlaceId != groundPlaceId)))
         {
-            gUnknown_3001B68->unkC = 1;
-            gUnknown_3001B68->unk20 = 1;
+            sUnknown_3001B68->unkC = 1;
+            sUnknown_3001B68->unk20 = 1;
         }
     }
-    if (gUnknown_3001B68->unkC != 0) {
-        gUnknown_3001B68->unk10 = uVar6;
-        gUnknown_3001B68->unk14 = param_1_s32;
-        gUnknown_3001B68->unk16 = param_2_s32;
-        gUnknown_3001B68->unk18 = uVar2;
-        gUnknown_3001B68->unk19 = uVar3;
-        if (gUnknown_3001B68->unk8 != 4) {
-            gUnknown_3001B68->unkC = 0;
-            gUnknown_3001B68->unk20 = 0;
+
+    if (sUnknown_3001B68->unkC != 0) {
+        sUnknown_3001B68->unk10 = uVar6;
+        sUnknown_3001B68->mapId = mapId;
+        sUnknown_3001B68->groundPlaceId = groundPlaceId;
+        sUnknown_3001B68->friendAreaId = friendAreaId;
+        sUnknown_3001B68->unk19 = uVar3;
+        if (sUnknown_3001B68->unk8 != 4) {
+            sUnknown_3001B68->unkC = 0;
+            sUnknown_3001B68->unk20 = 0;
         }
     }
 }
 
-void nullsub_105(void) {}
+void nullsub_105(void)
+{
+
+}
 
 void sub_809CA20(void)
 {
-    u16 *puVar1;
-
-    if (gUnknown_3001B68->unk0 != 0) {
-        gUnknown_3001B68->unk0 = 0;
-        gUnknown_3001B68->unk4 = 0x1f;
-        gUnknown_3001B68->unkC = 1;
+    if (sUnknown_3001B68->unk0 != 0) {
+        sUnknown_3001B68->unk0 = 0;
+        sUnknown_3001B68->unk4 = 0x1f;
+        sUnknown_3001B68->unkC = 1;
     }
-    if (gUnknown_3001B68->unkC != 0) {
-        puVar1 = &gUnknown_3001B68->unk8;
-        gUnknown_3001B68->unkA = *puVar1;
-        if ((*puVar1 == 4) && (gUnknown_3001B68->unk10 == 0)) {
-            gUnknown_3001B68->unkA = 2;
-            gUnknown_3001B68->unk1C = 0;
-            gUnknown_3001B68->unk20 = 0;
+    if (sUnknown_3001B68->unkC != 0) {
+        sUnknown_3001B68->unkA = sUnknown_3001B68->unk8;
+        if (sUnknown_3001B68->unk8 == 4 && sUnknown_3001B68->unk10 == 0) {
+            sUnknown_3001B68->unkA = 2;
+            sUnknown_3001B68->unk1C = 0;
+            sUnknown_3001B68->unk20 = 0;
         }
-        switch(gUnknown_3001B68->unkA) {
+        switch (sUnknown_3001B68->unkA) {
             case 3:
                 nullsub_111();
                 nullsub_113();
                 nullsub_112();
-                gUnknown_3001B68->unkD = 1;
+                sUnknown_3001B68->unkD = 1;
                 break;
             case 4:
                 nullsub_114();
@@ -359,11 +361,10 @@ void sub_809CA20(void)
                 nullsub_108();
                 break;
         }
-        gUnknown_3001B68->unkC = 0;
-
+        sUnknown_3001B68->unkC = 0;
     }
     else {
-        switch(gUnknown_3001B68->unkA) {
+        switch (sUnknown_3001B68->unkA) {
             case 3:
                 nullsub_113();
                 break;
@@ -378,14 +379,57 @@ void sub_809CA20(void)
     }
 }
 
-void nullsub_106(void) {}
-void nullsub_107(void) {}
-void nullsub_108(void) {}
-void nullsub_109(void) {}
-void nullsub_110(void) {}
-void nullsub_111(void) {}
-void nullsub_112(void) {}
-void nullsub_113(void) {}
-void nullsub_114(void) {}
-void nullsub_115(void) {}
-void nullsub_116(void) {}
+void nullsub_106(void)
+{
+
+}
+
+static void nullsub_107(void)
+{
+
+}
+
+static void nullsub_108(void)
+{
+
+}
+
+static void nullsub_109(void)
+{
+
+}
+
+static void nullsub_110(void)
+{
+
+}
+
+static void nullsub_111(void)
+{
+
+}
+
+static void nullsub_112(void)
+{
+
+}
+
+static void nullsub_113(void)
+{
+
+}
+
+static void nullsub_114(void)
+{
+
+}
+
+static void nullsub_115(void)
+{
+
+}
+
+static void nullsub_116(void)
+{
+
+}
diff --git a/src/debug_field_map.c b/src/debug_field_map.c
index ae57c5ec2..0fcd23418 100644
--- a/src/debug_field_map.c
+++ b/src/debug_field_map.c
@@ -143,7 +143,7 @@ UNUSED static void DebugMapViewer(void)
             DrawDialogueBoxString();
             sub_8005838(NULL, 0);
             sub_80060EC();
-            nullsub_8(gGameOptionsRef->unkA);
+            nullsub_8(gGameOptionsRef->touchScreen);
             sub_8005180();
             sub_8099BE4();
             sub_8099744();
diff --git a/src/dungeon_main.c b/src/dungeon_main.c
index 6d97aa3da..bd9671173 100644
--- a/src/dungeon_main.c
+++ b/src/dungeon_main.c
@@ -356,7 +356,7 @@ void DungeonHandlePlayerInput(void)
                 break;
             }
 
-            if (gGameOptionsRef->unk9 == 0
+            if (gGameOptionsRef->controls == CONTROLS_GBA
                 && (gRealInputs.pressed & B_BUTTON || (!unkBool && bPress))
                 && unkPtr->unk1821A != 0)
             {
@@ -386,7 +386,7 @@ void DungeonHandlePlayerInput(void)
             }
 
             highlightTiles = FALSE;
-            if (gGameOptionsRef->unk9 == 0) {
+            if (gGameOptionsRef->controls == CONTROLS_GBA) {
                 if (gRealInputs.shortPress & R_BUTTON || rPress || gRealInputs.pressed & START_BUTTON) {
                     highlightTiles = TRUE;
                 }
diff --git a/src/dungeon_menu_others.c b/src/dungeon_menu_others.c
index a0564ea3e..1b9953b0a 100644
--- a/src/dungeon_menu_others.c
+++ b/src/dungeon_menu_others.c
@@ -937,7 +937,7 @@ static void PrintHintsMenu(void)
 
 static void ShowChosenHintWindow(s32 hintId)
 {
-    bool8 unk9 = (gGameOptionsRef->unk9 != 0);
+    bool8 dsControls = (gGameOptionsRef->controls != CONTROLS_GBA);
 
     while (1) {
         bool8 dpadPressed = FALSE;
@@ -981,7 +981,7 @@ static void ShowChosenHintWindow(s32 hintId)
         gDungeonMenu.leftRightArrowsPos.y = ((gWindows[0].y + 1) * 8) - 2;
         sub_80073B8(0);
         PrintFormattedStringOnWindow(16 + hintId * 8, 0, gHintsNames[hintId], 0, '\0');
-        PrintFormattedStringOnWindow(8, 16, gHintsDescriptions[unk9][hintId], 0, '\0');
+        PrintFormattedStringOnWindow(8, 16, gHintsDescriptions[dsControls][hintId], 0, '\0');
         sub_80073E0(0);
 
         while (1) {
diff --git a/src/dungeon_vram.c b/src/dungeon_vram.c
index 71de2c7cd..d337c353c 100644
--- a/src/dungeon_vram.c
+++ b/src/dungeon_vram.c
@@ -210,7 +210,7 @@ static void sub_803E490(u32 unused)
     if(gDungeon->unk181e8.unk18215 != 0 && gDungeon->unk1BDD4.unk1C06C != 3)
         sub_8004AF0(gUnknown_203B40D, gUnknown_202EE8C, 0xA0, 0x20, gDungeonBrightness, gDungeon->colorRamp);
 
-    nullsub_8(gGameOptionsRef->unkA);
+    nullsub_8(gGameOptionsRef->touchScreen);
     sub_8005180();
     nullsub_12();
     sub_80060EC();
@@ -243,7 +243,7 @@ static void sub_803E490(u32 unused)
 void sub_803E668(u32 unused)
 {
     gUnknown_202EDD4++;
-    nullsub_8(gGameOptionsRef->unkA);
+    nullsub_8(gGameOptionsRef->touchScreen);
     sub_8005180();
     nullsub_12();
     sub_8005838(NULL, 0);
diff --git a/src/friend_areas_map_util.c b/src/friend_areas_map_util.c
index b482416e7..a50d54d68 100644
--- a/src/friend_areas_map_util.c
+++ b/src/friend_areas_map_util.c
@@ -378,7 +378,7 @@ void FriendAreasMap_RunFrameActions(void)
     AnimateSprites();
     sub_8004AF0(FadeScreen(), gFriendAreasMapPtr->unk4C4C, 0xB0, 16, gFriendAreasMapPtr->brightness, NULL);
     sub_8005838(NULL, 0);
-    nullsub_8(gGameOptionsRef->unkA);
+    nullsub_8(gGameOptionsRef->touchScreen);
     sub_8005180();
     sub_80060EC();
     IncrementPlayTime(gPlayTimeRef);
diff --git a/src/game_options.c b/src/game_options.c
index 23156bf42..8b8b705b1 100644
--- a/src/game_options.c
+++ b/src/game_options.c
@@ -30,8 +30,8 @@ void InitializeGameOptions(bool8 initializeGender)
     {
         gGameOptionsRef->playerGender = MALE;
     }
-    gGameOptionsRef->unk9 = 0;
-    gGameOptionsRef->unkA = 0;
+    gGameOptionsRef->controls = CONTROLS_GBA;
+    gGameOptionsRef->touchScreen = 0;
     gGameOptionsRef->dungeonSpeed = DUNGEON_SPEED_SLOW;
     gGameOptionsRef->FarOffPals = FAROFFPALS_LOCK;
     gGameOptionsRef->damageTurn = TRUE;
@@ -41,27 +41,27 @@ void InitializeGameOptions(bool8 initializeGender)
     SetWindowBGColor();
 }
 
-bool8 GameOptionsNotChange(GameOptions *r0)
+bool8 GameOptionsNotChange(GameOptions *newOptions)
 {
-    if (gGameOptionsRef->windowColor != r0->windowColor)
+    if (gGameOptionsRef->windowColor != newOptions->windowColor)
         return FALSE;
-    if (gGameOptionsRef->unk9 != r0->unk9)
+    if (gGameOptionsRef->controls != newOptions->controls)
         return FALSE;
-    if (gGameOptionsRef->unkA != r0->unkA)
+    if (gGameOptionsRef->touchScreen != newOptions->touchScreen)
         return FALSE;
-    if (gGameOptionsRef->playerGender != r0->playerGender)
+    if (gGameOptionsRef->playerGender != newOptions->playerGender)
         return FALSE;
-    if (gGameOptionsRef->dungeonSpeed != r0->dungeonSpeed)
+    if (gGameOptionsRef->dungeonSpeed != newOptions->dungeonSpeed)
         return FALSE;
-    if (gGameOptionsRef->FarOffPals != r0->FarOffPals)
+    if (gGameOptionsRef->FarOffPals != newOptions->FarOffPals)
         return FALSE;
-    if (gGameOptionsRef->damageTurn != r0->damageTurn)
+    if (gGameOptionsRef->damageTurn != newOptions->damageTurn)
         return FALSE;
-    if (gGameOptionsRef->gridEnable != r0->gridEnable)
+    if (gGameOptionsRef->gridEnable != newOptions->gridEnable)
         return FALSE;
-    if (gGameOptionsRef->mapOption != r0->mapOption)
+    if (gGameOptionsRef->mapOption != newOptions->mapOption)
         return FALSE;
-    if (gGameOptionsRef->unkC != r0->unkC)
+    if (gGameOptionsRef->unkC != newOptions->unkC)
         return FALSE;
 
     return TRUE;
@@ -79,7 +79,7 @@ void WriteGameOptionsBits(DataSerializer *param_1)
 
     WriteBits(param_1, &gGameOptionsRef->windowColor, 2);
 
-    if(gGameOptionsRef->unk9 != 0)
+    if (gGameOptionsRef->controls != CONTROLS_GBA)
     {
         puVar2 = &neg_1;
     }
@@ -89,7 +89,7 @@ void WriteGameOptionsBits(DataSerializer *param_1)
     }
     WriteBits(param_1, puVar2, 1);
 
-    if(gGameOptionsRef->unkA != 0)
+    if(gGameOptionsRef->touchScreen)
     {
         puVar2 = &neg_1;
     }
@@ -160,10 +160,10 @@ void ReadGameOptionsBits(DataSerializer *param_1)
     gGameOptionsRef->windowColor  = byteArray[0] & NUM_WINDOW_COLORS;
 
     ReadBits(param_1, byteArray, 1);
-    gGameOptionsRef->unk9  = byteArray[0] & 1;
+    gGameOptionsRef->controls  = byteArray[0] & 1;
 
     ReadBits(param_1, byteArray, 1);
-    gGameOptionsRef->unkA  = byteArray[0] & 1;
+    gGameOptionsRef->touchScreen  = byteArray[0] & 1;
 
     ReadBits(param_1, byteArray, 1);
     gGameOptionsRef->playerGender  = byteArray[0] & 1;
diff --git a/src/main_loops.c b/src/main_loops.c
index 9da3788d7..e724f68f8 100644
--- a/src/main_loops.c
+++ b/src/main_loops.c
@@ -281,7 +281,7 @@ static void MainLoops_RunFrameActions(u32 unused)
 {
     DrawDialogueBoxString();
     sub_8005838(NULL, 0);
-    nullsub_8(gGameOptionsRef->unkA);
+    nullsub_8(gGameOptionsRef->touchScreen);
 
     sub_8005180();
     // Extra call here in blue. Seems to be for 2nd screen sprites
diff --git a/src/world_map.c b/src/world_map.c
index 173aab7de..82ed190e2 100644
--- a/src/world_map.c
+++ b/src/world_map.c
@@ -404,7 +404,7 @@ static void WorldMap_RunFrameActions(void)
     AnimateSprites(TRUE);
     FadeScreen();
     sub_8005838(NULL, 0);
-    nullsub_8(gGameOptionsRef->unkA);
+    nullsub_8(gGameOptionsRef->touchScreen);
     sub_8005180();
     sub_80060EC();
     IncrementPlayTime(gPlayTimeRef);