A new version has been uploaded. It brings changes to the audio system: There's no longer latency playing the sounds. The maximum number of channels (sounds playing simultaneously) has been increased to 64 (you can increase it for your system in the Audio Settings). There should be no more crashes when the game is started. (fixed in version 1.1.7)
It also fixes the situation where the level music would keep playing after you die and go back to the character selection screen. (fixed in version 1.1.8)
Enjoy!