Eh sadly you're not the first one telling me about getting stuck and I'll have to look on it, I think it may be an issue with the web version that I didn't have that much time to test :-\
Regarding the SFX it was more due to time than to choice, it would've been the next thing to put in the game, also the movement probably needed some more tweaking.
The idea was to be able to exit it in the beginning but I scrapped it since I was not sure about it, the other idea that I implemented but I removed at the last moment was also the ability to change your color by using a turn, but it felt to me like it dragged the game too much, but maybe it was a good idea, I clearly need some more experience in development to understand better what can and cannot work before putting it in code :D