I discovered the error that made the music not sound and it was the VAPE mode, at the beginning of the fourth I put the first music to play but apparently when I gave Jimmy the source code I deactivated it, so what I did is deactivate the de the music, EVERYTHING FIXED :D

Jimmy if you are reading this do not worry, I will not get mad at you, I will ask you thank you very much for helping me in the fangame, the official demo will be coming soon guys ^_^