Very cool concept!
Nice variety of enemies that challenge you in different ways, and good sound effects.
The music got a bit repetitive after a while, but not in an annoying way.
I missed having visual feedback from the enemies when they take damage, especially the boss! I didn't know if it was taking damage or is there some gimmick with the exploding drones that I should be doing.
It took me a while to get used to the controls, I got confused about movement directions every time I teleported, but I think that's just me being me.