My game has glitches... ALOT

https://flowlab.io/game/play/942276 My game is a horror game, but I can’t get a lot of enemies to work due to bugs, design, and me being an awfully young game maker, can anyone help?

It is more of a post-apocalyptic game, and I’ve got to say that it looks fantastic so far.
Also, when asking for support, try to be more specific. What about the enemies do you need help with?