Now I tried to download the game without using the itch app and it worked fine. But when playing it using the itch app there is this problem.
Edit: It works also in the itch app, I just hadn't updated it. Also, good game.
Thank you so much! if and when I get it on steam and once it's more complete, I'll at least send a key your way, just for saving me by telling me about this bug :D