The hand drawn Mima art (and sprite) is super cute. The intro went too fast for me to read it all, but I caught something about ghost butt ;_;
Sweet music!
I appreciate how fast and well-controlled the movement is, and the variety of hazards. It lacks a lot of polish but is still quite fun and, uh, makes me smile with its charm.
I do wish there was some indicator of taking damage (sound effect, visual animation, maybe even affecting the player's momentum).
I think the scream part was questionable. Some people get really sick from stuff like that.