I loved the aesthetics and the moody music. Didn't really get what I was supposed to be doing but moving really fast when you jump was fun. There was some weird distortion or tearing at the top of the screen when I jumped, I don't know if that was intentional? Also when getting teleported back to the start, there was a black bar along the top. I'd put in a fade to black to hide the transition
Some feedback, either a sound effect or something when attacking would have been good, I didn't really feel like I was doing anything and it wasn't necessary to kill the enemies - which I guess goes with the purgatory theme. A certain futility is to be expected