I'm going to tell you right now, if you intend on playing this game, don't. Buy the "full" version from steam or watch some footage of the "full" game.This was rushed for a timed contest, and it shows. There are 4 bosses *spoilers ahead*: a giant frozen brain, a rolling eye thing, a giant that throws rocks, and yourself. Yep, the ending is you killing yourself, which is just a cop out if you ask me. The hitboxes are just a bit wonky, and some bosses exploit that a bit; Namely, the brain and the eye. The eye and brain wouldn't be too bad EXCEPT that you can't tell whether your character is about to shoot or not. If you don't hold the button down long enough, you won't shoot. There's no indication as to how long it takes. So in these fights where speed is essential, you will probably lose at least once because your character didn't shoot when you needed them to.
When you try to get the free medal near the end of the betrayed, when the prompt says "don't press this button" if you mouse over the retry button, the correct button will appear. keep pressing the button in every dialog prompt from then on and it's smooth sailing to reach the free medal.