I think other's have gotten most of what I'd want to say down, but something I want to bring up is that the floors are often very dark and mostly black. And unfortunately, so are the stationary ground hazards. Because it's hard to tell what's safe and what's not in some places at a glance, I end up just taking damage while walking forward and not really feeling like it's my fault since I just couldn't tell the difference between the two.
Other than that, great work on the art and the whole visual aesthetic. It's really cool and sometimes rather pretty to look at. The cutscenes are great and I think I managed to get to the end? I got a second set of cutscenes after defeating an eyeball thing before getting sent back to the start, but collision was all sorts of wonky as I ended up wall jumping myself into a corner and getting stuck. I don't know what happened there. Still, great job!