Made it to level 4, and couldn't make it past this little straightaway part where you are running away from an eye, and you have to time the jump perfectly to get out of the range of the first eye, just to have another eye eat me up on the platform above.
This game is rage-inducing fun. I can tell there were a lot of carefully placed eyes and blocks to just barely allow you to proceed in a level. It's definitely a skill issue, but I'd like some of these to be tuned just a bit more in my favor to have me want to keep trying.
The lighting-as-health is creative and works very well. I think you could make the gameplay feel a bit more in the player's hands by having the eyes all cast feint lines of light from their max/min ranges so the player can plan their next moves to a safe spot, instead of relying on dying and trying again to figure things out. I know in practice this might make the game feel visually cluttered, but just an idea.
The relic system was cool, it gave me a break from wanting to smash my keyboard from failing jumps and attempt to figure out a puzzle (only figured out the first one, but it was very satisfying jumping freely to the end).