the idea is good but
the character controller has no coyote time/variable jump height
and the fact that there's no sound
When I first made the game I was still kind of amateur and didn't consider variable jumpheight. and unfortunately at this stage most of the levels have been explicitly designed around not having a variable jump height so this is probably going to stick.
I'm also clueless at sound design and I have no idea how to add music to this game without ruining the eerie mood