feat: prevent reversing directly into snake neck and play denied sound effect

source/game_audio.cpp

@@ -14,6 +14,7 @@ void audio_setup(AudioContext &audio) {
     mmLoadEffect(SFX_167126__CRISSTANZA__UNPAUSE);
     mmLoadEffect(SFX_273792__PACOMAV__PLOP);
     mmLoadEffect(SFX_73750__TIMBRE__REMIX_OF_BENBONCAN_SAD_TROMBONE_MORE_WAH_BRIGHT_DE_CLICKED);
+    mmLoadEffect(SFX_DENIED);
 
     audio.sfx_pickup = {
         { SFX_332629__TREASURESOUNDS__ITEM_PICKUP },
@@ -62,6 +63,14 @@ void audio_setup(AudioContext &audio) {
         255,
         128,
     };
+
+    audio.sfx_denied = {
+        { SFX_DENIED },
+        static_cast<int>(1.0F * (1 << 10)),
+        5,
+        160,
+        128,
+    };
 }
 
 void audio_start_music(const AudioContext &audio) {
@@ -111,6 +120,10 @@ void audio_play_fail(const AudioContext &audio) {
     mmEffectEx(&audio.sfx_fail);
 }
 
+void audio_play_denied(const AudioContext &audio) {
+    mmEffectEx(&audio.sfx_denied);
+}
+
 bool audio_toggle_music(AudioContext &audio) {
     audio.musicEnabled = !audio.musicEnabled;