Hitboxes seem a little unpredictable the bats were easy to deal with, but I ran into issues with the ground enemies hitting me when I wasn't close to them and them not being hit when it looked liked it should. (I chose to run away from them instead of fighting)
I like the concept of restoring colors, but after each level the game goes back to black and white. I think it would be cool if parts of the game became colored after each level and after the final one everything has colors again rather than resetting each level.