Cool intro and concept for a game!
I'm kinda with others saying that a bit more tutorial and maybe a bit more explanation of what is going on seems to be needed.
I felt pretty lost roaming around not exactly knowing what to do, then I feel in some place where I just kinda gave up. It didn't help that after I died I think that I found some bug where the player and the enemies both sort of take turns being invisible? If you want any more info just let me know.
The rest of the game (menu, intro, etc) feels very polished, but the core gameplay and start of game are lacking something.