I had to play with brightness to the max cuz I'm a sissy (ΘεΘ;). The wording of the instructions was pretty good! :) I liked the look and feel of the map. The mix of pixel art and hand drawn art on the UI looked a bit strange. Sometimes I wouldn't take damage from hits, but it didn't really feel bad. Health felt like the most important score. Checkpoints might help. The hurt box sizes felt just right. I wasn't really satisfied with how the story ended, but the ending choice of music was excellent!
EDIT: Just remembered: Occasionally it would crash at random points. I was using the Linux export.