diff --git a/src/game/bettercamera.inc.h b/src/game/bettercamera.inc.h
index faf676a8..2bddce8f 100644
--- a/src/game/bettercamera.inc.h
+++ b/src/game/bettercamera.inc.h
@@ -636,7 +636,7 @@ static void newcam_set_pan(void) {
     newcam_pan_z = newcam_pan_z*(min(newcam_distance/newcam_distance_target,1));
 }
 
-static void newcam_level_bounds() {
+static void newcam_level_bounds(void) {
     u8 hasMinY = FALSE;
     f32 minY = 0;
     get_area_minimum_y(&hasMinY, &minY);
diff --git a/src/game/level_info.c b/src/game/level_info.c
index ab72cff1..449760be 100644
--- a/src/game/level_info.c
+++ b/src/game/level_info.c
@@ -160,7 +160,7 @@ static void decapitalize_string_sm64(u8 *str64) {
     }
 }
 
-void *get_course_name_table() {
+void *get_course_name_table(void) {
     void **courseNameTbl = segmented_to_virtual(seg2_course_name_table);
 
 #ifdef VERSION_EU
@@ -174,7 +174,7 @@ void *get_course_name_table() {
     return courseNameTbl;
 }
 
-void *get_act_name_table() {
+void *get_act_name_table(void) {
     void **actNameTbl = segmented_to_virtual(seg2_act_name_table);
 
 #ifdef VERSION_EU
diff --git a/src/game/level_info.h b/src/game/level_info.h
index 372921d2..1086ce8e 100644
--- a/src/game/level_info.h
+++ b/src/game/level_info.h
@@ -3,8 +3,8 @@
 
 #include <PR/ultratypes.h>
 
-void *get_course_name_table();
-void *get_act_name_table();
+void *get_course_name_table(void);
+void *get_act_name_table(void);
 const char *get_level_name_ascii(s16 courseNum, s16 levelNum, s16 areaIndex, s16 charCase);
 const u8   *get_level_name_sm64(s16 courseNum, s16 levelNum, s16 areaIndex, s16 charCase);
 const char *get_level_name(s16 courseNum, s16 levelNum, s16 areaIndex);
diff --git a/src/pc/configfile.c b/src/pc/configfile.c
index 505112c9..be8495a0 100644
--- a/src/pc/configfile.c
+++ b/src/pc/configfile.c
@@ -363,7 +363,7 @@ static void moderator_write(FILE* file) {
 
 static struct QueuedFile *sQueuedEnableDynosPacksHead = NULL;
 
-void enable_queued_dynos_packs() {
+void enable_queued_dynos_packs(void) {
     while (sQueuedEnableDynosPacksHead) {
         int packCount = dynos_pack_get_count();
         const char *path = sQueuedEnableDynosPacksHead->path;
diff --git a/src/pc/configfile.h b/src/pc/configfile.h
index de198b90..f9241410 100644
--- a/src/pc/configfile.h
+++ b/src/pc/configfile.h
@@ -124,8 +124,8 @@ extern unsigned int configDjuiScale;
 extern bool         configGlobalPlayerModels;
 extern char         configLastVersion[];
 
-void enable_queued_mods();
-void enable_queued_dynos_packs();
+void enable_queued_mods(void);
+void enable_queued_dynos_packs(void);
 void configfile_load(void);
 void configfile_save(const char *filename);
 const char *configfile_name(void);
diff --git a/src/pc/djui/djui_panel_main.c b/src/pc/djui/djui_panel_main.c
index 79e9e252..f6a4c14d 100644
--- a/src/pc/djui/djui_panel_main.c
+++ b/src/pc/djui/djui_panel_main.c
@@ -30,21 +30,21 @@ void djui_panel_main_create(struct DjuiBase* caller) {
         struct DjuiBase* body = djui_three_panel_get_body(panel);
         {
             struct DjuiImage* logo = djui_image_create(body, texture_coopdx_logo, 2048, 1024, 32);
-            djui_base_set_size(&logo->base, 370.0f, 185.0f);
+            djui_base_set_size(&logo->base, 500, 250);
             djui_base_set_alignment(&logo->base, DJUI_HALIGN_CENTER, DJUI_VALIGN_TOP);
             djui_base_set_location_type(&logo->base, DJUI_SVT_RELATIVE, DJUI_SVT_ABSOLUTE);
-            djui_base_set_location(&logo->base, 0, -50.0f);
+            djui_base_set_location(&logo->base, 0, -70);
 
             struct DjuiButton* button1 = djui_button_create(body, DLANG(MAIN, HOST), DJUI_BUTTON_STYLE_NORMAL, djui_panel_host_create);
-            djui_base_set_location(&button1->base, 0, -30.0f);
+            djui_base_set_location(&button1->base, 0, -60);
             djui_cursor_input_controlled_center(&button1->base);
 
             struct DjuiButton* button2 = djui_button_create(body, DLANG(MAIN, JOIN), DJUI_BUTTON_STYLE_NORMAL, djui_panel_join_create);
-            djui_base_set_location(&button2->base, 0, -30.0f);
+            djui_base_set_location(&button2->base, 0, -60);
             struct DjuiButton* button3 = djui_button_create(body, DLANG(MAIN, OPTIONS), DJUI_BUTTON_STYLE_NORMAL, djui_panel_options_create);
-            djui_base_set_location(&button3->base, 0, -30.0f);
+            djui_base_set_location(&button3->base, 0, -60);
             struct DjuiButton* button4 = djui_button_create(body, DLANG(MAIN, QUIT), DJUI_BUTTON_STYLE_BACK, djui_panel_main_quit);
-            djui_base_set_location(&button4->base, 0, -30.0f);
+            djui_base_set_location(&button4->base, 0, -60);
         }
 
         // these two cannot co-exist for some reason
diff --git a/src/pc/loading.c b/src/pc/loading.c
index 8112a8fa..acf41040 100644
--- a/src/pc/loading.c
+++ b/src/pc/loading.c
@@ -30,11 +30,11 @@ void loading_screen_set_segment_text(const char *text) {
     snprintf(gCurrLoadingSegment.str, 256, text);
 }
 
-static void loading_screen_produce_frame_callback() {
+static void loading_screen_produce_frame_callback(void) {
     if (sLoading && !gCLIOpts.hideLoadingScreen) { djui_base_render(&sLoading->base); }
 }
 
-static void loading_screen_produce_one_frame() {
+static void loading_screen_produce_one_frame(void) {
     produce_one_dummy_frame(loading_screen_produce_frame_callback);
 }
 
@@ -84,7 +84,7 @@ static void loading_screen_destroy(struct DjuiBase* base) {
     sLoading = NULL;
 }
 
-void init_loading_screen() {
+void init_loading_screen(void) {
     struct LoadingScreen* load = calloc(1, sizeof(struct LoadingScreen));
     struct DjuiBase* base = &load->base;
 
@@ -93,7 +93,7 @@ void init_loading_screen() {
     {
         // splash image
         struct DjuiImage* splashImage = djui_image_create(base, texture_coopdx_logo, 2048, 1024, 32);
-        djui_base_set_size(&splashImage->base, 740.0f, 364.0f);
+        djui_base_set_size(&splashImage->base, 1024, 512);
         djui_base_set_alignment(&splashImage->base, DJUI_HALIGN_CENTER, DJUI_VALIGN_CENTER);
         djui_base_set_location(&splashImage->base, 0, -100);
 
@@ -111,7 +111,7 @@ void init_loading_screen() {
         djui_base_set_color(&text->base, 200, 200, 200, 255);
         djui_text_set_alignment(text, DJUI_HALIGN_CENTER, DJUI_VALIGN_TOP);
         djui_text_set_font(text, gDjuiFonts[0]);
-        djui_text_set_font_scale(text, gDjuiFonts[0]->defaultFontScale * 1.5f);
+        djui_text_set_font_scale(text, gDjuiFonts[0]->defaultFontScale * 1.9f);
 
         load->loadingDesc = text;
     }
@@ -130,7 +130,7 @@ void init_loading_screen() {
     sLoading = load;
 }
 
-void loading_screen_reset() {
+void loading_screen_reset(void) {
     djui_base_destroy(&sLoading->base);
     djui_shutdown();
     alloc_display_list_reset();
@@ -139,7 +139,7 @@ void loading_screen_reset() {
     configWindow.settings_changed = true;
 }
 
-void render_loading_screen() {
+void render_loading_screen(void) {
     if (!sLoading) { init_loading_screen(); }
 
     // loading screen loop
@@ -153,7 +153,7 @@ void render_loading_screen() {
     loading_screen_reset();
 }
 
-void render_rom_setup_screen() {
+void render_rom_setup_screen(void) {
     if (!sLoading) { init_loading_screen(); }
 
     loading_screen_set_segment_text("No rom detected, drag & drop Super Mario 64 (U) [!].z64 on to this screen");
diff --git a/src/pc/loading.h b/src/pc/loading.h
index bc70267f..25c231ab 100644
--- a/src/pc/loading.h
+++ b/src/pc/loading.h
@@ -25,7 +25,7 @@ extern pthread_mutex_t gLoadingThreadMutex;
 extern bool gIsThreaded;
 
 void loading_screen_set_segment_text(const char *text);
-void render_loading_screen();
-void render_rom_setup_screen();
+void render_loading_screen(void);
+void render_rom_setup_screen(void);
 
 #endif
diff --git a/src/pc/lua/utils/smlua_text_utils.c b/src/pc/lua/utils/smlua_text_utils.c
index cba9ccaa..d85c4b23 100644
--- a/src/pc/lua/utils/smlua_text_utils.c
+++ b/src/pc/lua/utils/smlua_text_utils.c
@@ -27,7 +27,7 @@ void convert_string_sm64_to_ascii(char *strAscii, const u8 *str64);
 struct CourseName *gReplacedActNameTable[COURSE_END];
 
 // Save all vanilla act names and course names
-void smlua_text_utils_init() {
+void smlua_text_utils_init(void) {
     void **actNameTbl = get_act_name_table();
     void **courseNameTbl = get_course_name_table();
     char courseBuffer[50];
diff --git a/src/pc/lua/utils/smlua_text_utils.h b/src/pc/lua/utils/smlua_text_utils.h
index 103b945b..c500bb2b 100644
--- a/src/pc/lua/utils/smlua_text_utils.h
+++ b/src/pc/lua/utils/smlua_text_utils.h
@@ -21,7 +21,7 @@ struct CourseName {
 
 extern struct CourseName *gReplacedActNameTable[];
 
-void smlua_text_utils_init();
+void smlua_text_utils_init(void);
 void smlua_text_utils_reset_all(void);
 void smlua_text_utils_dialog_replace(enum DialogId dialogId, u32 unused, s8 linesPerBox, s16 leftOffset, s16 width, const char* str);
 void smlua_text_utils_course_acts_replace(s16 courseNum, const char* courseName, const char* act1, const char* act2, const char* act3, const char* act4, const char* act5, const char* act6);
diff --git a/src/pc/rom_checker.cpp b/src/pc/rom_checker.cpp
index 68548ba6..fa7c2187 100644
--- a/src/pc/rom_checker.cpp
+++ b/src/pc/rom_checker.cpp
@@ -71,7 +71,7 @@ inline static bool scan_path_for_rom(const char *dir) {
 }
 
 extern "C" {
-bool main_rom_handler() {
+bool main_rom_handler(void) {
     if (scan_path_for_rom(sys_user_path())) { return true; }
     scan_path_for_rom(sys_exe_path());
     return gRomIsValid;
diff --git a/src/pc/rom_checker.h b/src/pc/rom_checker.h
index 67889604..c053f8a3 100644
--- a/src/pc/rom_checker.h
+++ b/src/pc/rom_checker.h
@@ -3,5 +3,5 @@
 extern bool gRomIsValid;
 extern char gRomFilename[];
 
-bool main_rom_handler();
+bool main_rom_handler(void);
 void rom_on_drop_file(const char *path);
diff --git a/tools/copy_extended_sounds.py b/tools/copy_extended_sounds.py
index d8150a43..c381727b 100644
--- a/tools/copy_extended_sounds.py
+++ b/tools/copy_extended_sounds.py
@@ -22,6 +22,9 @@ if not os.path.exists('sound/samples/extended/'):
     print('Created extended soundbank folder, as it was missing')
 
 def copy_dir(source, destinations):
+    if not os.path.exists(source):
+        return
+
     for filename in os.listdir(source):
         if not filename.endswith('.aiff'):
             continue