diff --git a/include/config.h b/include/config.h
index 6db8ed4d6..85d1a89eb 100644
--- a/include/config.h
+++ b/include/config.h
@@ -4,8 +4,8 @@
 /**
  * @brief Use a custom course engine
  * Use a custom course engine instead of the default one who use switch. see course.h and everywhere
- * USE_CUSTOM_COURSE_ENGINE are use to define your
+ * ENABLE_CUSTOM_COURSE_ENGINE are use to define your
  *
  */
-#define USE_CUSTOM_COURSE_ENGINE 0
+#define ENABLE_CUSTOM_COURSE_ENGINE 0
 #endif
diff --git a/include/course.h b/include/course.h
index c1546a29f..ff99e5933 100644
--- a/include/course.h
+++ b/include/course.h
@@ -26,7 +26,7 @@ struct _struct_gCoursePathSizes_0x10 {
     /* 0x0A */ char padA[6];
 }; // size 0x10
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
 typedef enum {
     /* 0x00 */ COURSE_MARIO_RACEWAY = 0,
     /* 0x01 */ COURSE_CHOCO_MOUNTAIN,
@@ -79,7 +79,7 @@ typedef enum {
 
 #endif
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
 extern s16 gCurrentCourseId;
 extern s16* D_800DCBB4[];
 #define GET_COURSE_800DCBB4(n) D_800DCBB4[gCurrentCourseId][n]
diff --git a/src/code_800029B0.c b/src/code_800029B0.c
index d6460ea57..34ca227df 100644
--- a/src/code_800029B0.c
+++ b/src/code_800029B0.c
@@ -26,7 +26,7 @@
 
 extern s32 D_802BA038;
 extern s16 D_802BA048;
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
 s16 gCurrentCourseId = 0;
 #endif
 s16 gCurrentlyLoadedCourseId = 0xFF;
@@ -245,7 +245,7 @@ void setup_race(void) {
 
 // sound related
 void func_80002DAC(void) {
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             vec3f_set(D_8015F748, -223.0f, 94.0f, -155.0f);
@@ -309,7 +309,7 @@ void func_80003040(void) {
     gPlayerCountSelection1 = 1;
     set_segment_base_addr(0x3, (void*) (gNextFreeMemoryAddress + 0xFFFF7000));
     destroy_all_actors();
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             dma_textures(gTextureTrees1, 0x35B, 0x800);
diff --git a/src/code_80005FD0.c b/src/code_80005FD0.c
index b635907d5..648a079f6 100644
--- a/src/code_80005FD0.c
+++ b/src/code_80005FD0.c
@@ -1538,7 +1538,7 @@ void update_vehicles(void) {
                 func_8000DF8C(i);
             }
         }
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
         switch (gCurrentCourseId) {
             case COURSE_KALAMARI_DESERT:
                 update_vehicle_trains();
@@ -3467,7 +3467,7 @@ void func_8000F2DC(void) {
     }
 
     D_80164430 = *gWaypointCountByPathIndex;
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_KALAMARI_DESERT:
             generate_train_waypoints();
@@ -4412,7 +4412,7 @@ void spawn_course_vehicles(void) {
     f32 origXPos;
     f32 origZPos;
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_KALAMARI_DESERT:
             for (loopIndex = 0; loopIndex < NUM_TRAINS; loopIndex++) {
diff --git a/src/code_8003DC40.c b/src/code_8003DC40.c
index 58c3b0a0f..b97838b71 100644
--- a/src/code_8003DC40.c
+++ b/src/code_8003DC40.c
@@ -233,7 +233,7 @@ void func_8003F46C(Player* player, Vec3f arg1, Vec3f arg2, Vec3f arg3, f32* arg4
         player->kartHopVelocity = 0.0f;
         return;
     } else {
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
         switch (gCurrentCourseId) {
             case COURSE_MARIO_RACEWAY:
                 func_8003E048(player, arg1, arg2, arg3, arg4, arg5, arg6, arg7);
diff --git a/src/code_80057C60.c b/src/code_80057C60.c
index a4385ee1e..4a0134e08 100644
--- a/src/code_80057C60.c
+++ b/src/code_80057C60.c
@@ -692,7 +692,7 @@ void render_player_snow_effect_four(void) {
 }
 
 void render_object_for_player(s32 cameraId) {
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             break;
@@ -1570,7 +1570,7 @@ void func_8005A71C(void) {
 }
 
 void update_object(void) {
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
         case COURSE_CHOCO_MOUNTAIN:
diff --git a/src/code_8006E9C0.c b/src/code_8006E9C0.c
index 164dd9b4f..3ee13e5d6 100644
--- a/src/code_8006E9C0.c
+++ b/src/code_8006E9C0.c
@@ -183,7 +183,7 @@ void course_mini_map_settings(void) {
     if (gCurrentCourseId < NUM_COURSES - 1) {
         func_8006EEE8((s32) gCurrentCourseId);
     }
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             D_8018D220 = (void*) dma_textures(gTextureExhaust5, 0x443, 0x1000);
@@ -691,7 +691,7 @@ void course_init_cloud(void) {
     s32 var_s0;
     s32 var_s4;
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             // Uses Kalimari Desert's clouds for initialization?
@@ -763,7 +763,7 @@ void init_course_objects(void) {
     s32 objectId;
     s32 i;
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             if (gGamestate != 9) {
diff --git a/src/code_80091750.c b/src/code_80091750.c
index f90eb325e..3da095763 100644
--- a/src/code_80091750.c
+++ b/src/code_80091750.c
@@ -315,7 +315,7 @@ char* gCupNames[] = {
     "special cup",
 };
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
 // Displays at beginning of course
 char* gCourseNames[] = {
 #include "assets/course_metadata/gCourseNames.inc.c"
@@ -332,7 +332,7 @@ char* gCourseNamesDup2[] = {
 #include "assets/course_metadata/gCourseNames.inc.c"
 };
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
 // Used in debug menu at splash screen
 char* gDebugCourseNames[] = {
 #include "assets/course_metadata/gCourseDebugNames.inc.c"
diff --git a/src/data/path_spawn_metadata.c b/src/data/path_spawn_metadata.c
index 71ac2ec13..eccb145d7 100644
--- a/src/data/path_spawn_metadata.c
+++ b/src/data/path_spawn_metadata.c
@@ -2,7 +2,7 @@
 #include "courses/all_course_data.h"
 #include <assets/ceremony_data.h>
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
 // @warning Array contains an extra zero element at the end.
 KartAIBehaviour* gKartAIBehaviourLUT[] = {
 #include "assets/course_metadata/gKartAIBehaviourLUT.inc.c"
@@ -14,7 +14,7 @@ KartAIBehaviour* gKartAIBehaviourLUT[] = {
 
 TrackWaypoint nullPath = { 0x8000, 0x0000, 0x0000, 0x0000 };
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
 TrackWaypoint* gCoursePathTable[][4] = {
 #include "assets/course_metadata/gCoursePathTableUnknown.inc.c"
 };
@@ -68,7 +68,7 @@ BombKartSpawn gBombKartSpawns[][NUM_BOMB_KARTS_MAX] = {
 #include "assets/course_metadata/gBombKartSpawns.inc.c"
 };
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
 struct _struct_gCoursePathSizes_0x10 gCoursePathSizes[] = {
 #include "assets/course_metadata/gCoursePathSizes.inc.c"
 };
diff --git a/src/effects.c b/src/effects.c
index d279c2703..d83eb21d4 100644
--- a/src/effects.c
+++ b/src/effects.c
@@ -1591,7 +1591,7 @@ void func_8008FEDC(Player* player, UNUSED s8 arg1) {
 void course_update_waypoint(Player* player, s8 playerId) {
     s16 waypoint;
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_BOWSER_CASTLE:
             waypoint = gNearestWaypointByPlayerId[playerId];
diff --git a/src/player_controller.c b/src/player_controller.c
index 0b5209043..040198876 100644
--- a/src/player_controller.c
+++ b/src/player_controller.c
@@ -247,7 +247,7 @@ void func_80027EDC(Player* player, s8 playerId) {
     if (((player->type & PLAYER_HUMAN) == PLAYER_HUMAN) &&
         ((player->type & PLAYER_INVISIBLE_OR_BOMB) != PLAYER_INVISIBLE_OR_BOMB)) {
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
         switch (gCurrentCourseId) {
             case COURSE_MARIO_RACEWAY:
                 if (((s16) gNearestWaypointByPlayerId[playerId] >= 0x19B) &&
@@ -382,7 +382,7 @@ void func_80027EDC(Player* player, s8 playerId) {
 
 #endif
     } else {
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
         switch (gCurrentCourseId) {
             case COURSE_MARIO_RACEWAY:
                 if (((s16) gNearestWaypointByPlayerId[playerId] >= 0x19B) &&
diff --git a/src/racing/actors.c b/src/racing/actors.c
index ed9bd0847..e60249023 100644
--- a/src/racing/actors.c
+++ b/src/racing/actors.c
@@ -1053,7 +1053,7 @@ void spawn_course_actors(void) {
     struct RailroadCrossing* rrxing;
 
     gNumPermanentActors = 0;
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             spawn_foliage(d_course_mario_raceway_tree_spawns);
@@ -1212,7 +1212,7 @@ void init_actors_and_load_textures(void) {
     dma_textures(gTextureFinishLineBanner8, 0x0000025BU, 0x00000800U);
     dma_textures(gTexture671A88, 0x00000400U, 0x00000800U);
     dma_textures(gTexture6774D8, 0x00000400U, 0x00000800U);
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             dma_textures(gTextureTrees1, 0x0000035BU, 0x00000800U);
diff --git a/src/racing/render_courses.c b/src/racing/render_courses.c
index 936cf662c..4cb202acb 100644
--- a/src/racing/render_courses.c
+++ b/src/racing/render_courses.c
@@ -1260,11 +1260,12 @@ void render_big_donut(struct UnkStruct_800DC5EC* arg0) {
 }
 
 /**
- * @brief dev made two version of the Course one for 1-4p and another for credit.
+ * @brief The game has two versions of each course. One for normal gameplay and another for credits.
+ * The credits version is not split into segments so that the game camera can fly around the whole course.
  *
  */
 void render_course_credits(void) {
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             gSPDisplayList(gDisplayListHead++, d_course_mario_raceway_dl_9348);
@@ -1340,7 +1341,7 @@ void render_course(struct UnkStruct_800DC5EC* arg0) {
         return;
     }
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             render_mario_raceway(arg0);
@@ -1466,7 +1467,7 @@ void course_generate_collision_mesh(void) {
     gCollisionMesh = (CollisionTriangle*) gNextFreeMemoryAddress;
     D_800DC5BC = 0;
     D_800DC5C8 = 0;
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             // d_course_mario_raceway_packed_dl_1140
@@ -1678,7 +1679,7 @@ void course_generate_collision_mesh(void) {
 }
 
 void course_update_water(void) {
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_KOOPA_BEACH:
             // clang-format off
diff --git a/src/racing/skybox_and_splitscreen.c b/src/racing/skybox_and_splitscreen.c
index ead261ddc..281cedda3 100644
--- a/src/racing/skybox_and_splitscreen.c
+++ b/src/racing/skybox_and_splitscreen.c
@@ -406,7 +406,7 @@ void course_set_skybox_colours(Vtx* skybox) {
         return;
     }
 
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     skybox[0].v.cn[0] = sTopSkyBoxColors[gCurrentCourseId].topRed;
     skybox[0].v.cn[1] = sTopSkyBoxColors[gCurrentCourseId].topGreen;
     skybox[0].v.cn[2] = sTopSkyBoxColors[gCurrentCourseId].topBlue;
diff --git a/src/render_objects.c b/src/render_objects.c
index 44f6904f7..260ab35fa 100644
--- a/src/render_objects.c
+++ b/src/render_objects.c
@@ -2451,7 +2451,7 @@ void render_mini_map_finish_line(s32 arg0) {
 
     var_f2 = ((gMiniMapFinishLineX[arg0] + D_8018D2F0) - (D_8018D2B0 / 2)) + gMiniMapX;
     var_f0 = ((gMiniMapFinishLineY[arg0] + D_8018D2F8) - (D_8018D2B8 / 2)) + gMiniMapY;
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) { /* irregular */
         case COURSE_MARIO_RACEWAY:
             var_f0 = var_f0 - 2.0;
diff --git a/src/staff_ghosts.c b/src/staff_ghosts.c
index 7a1b8feb3..080c49e3f 100644
--- a/src/staff_ghosts.c
+++ b/src/staff_ghosts.c
@@ -108,7 +108,7 @@ void func_80004FF8(void) {
 
 void set_staff_ghost(void) {
     u32 temp_v0; // Appears to be player total lap time.
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
     switch (gCurrentCourseId) {
         case COURSE_MARIO_RACEWAY:
             temp_v0 = func_800B4E24(0) & 0xfffff;
diff --git a/src/update_objects.c b/src/update_objects.c
index c633b169f..e3de096e8 100644
--- a/src/update_objects.c
+++ b/src/update_objects.c
@@ -2868,7 +2868,7 @@ void course_update_clouds(s32 arg0) {
         D_8018D210 = (-(D_8018D200 / 2) * 0xB6) - 0x71C;
         D_8018D1E8 = 1.7578125 / D_8018D200;
         D_8018D218 = 0xA0;
-#if !USE_CUSTOM_COURSE_ENGINE
+#if !ENABLE_CUSTOM_COURSE_ENGINE
         switch (gCurrentCourseId) {    /* switch 2 */
             case COURSE_MARIO_RACEWAY: /* switch 2 */
                 // Uses Luigi Raceway's clouds for display purposes?