Fantastic entry! I love that you can't see yourself, which forces you to flip back and forth between yourself and a direction. There's a massive difficulty ramp on either the 3rd or 4th level (I forget) where it seems like there's a corridor of enemies. I couldn't just walk past, nor could I stop and look for enemies otherwise I kept dying, so I wasn't able to get past that.
I'm curious as to how you implemented what to show in a direction. I would love a basic breakdown if you're willing to divulge.
One tweak I might suggest is to briefly show the enemy that kills you (and hide the player for the theme). It has an ever so slight "cheated" feel to die in that part I mentioned without ever seeing the enemy. It would also make it easier to see how far apart the enemy is from the previous one.