a bunch of little bugfixes

hi people! new number again, this is version 2.1 now! you can now play the first boss rush level (it didn’t work before) and the boss rush health bars properly function now. plus a bunch of other changes that i can’t remember lol. anyway, i just made this post to justify renaming the file to 2.1. also, i found someone on youtube who played my game, go like their video: https://www.youtube.com/watch?v=MCjFCLPXwk0, have a nice day, the end