Very nice art style. I liked the music very much, but it was frustrating that it restarted on every level/death. Just let it play continuously, especially when levels are so short and you die so quickly.
It was pretty frustrating to only get one go at a level, but I get that was part of the theme. But that aspect of it wasn't fun.
Controls were pretty janky, walk and jump speed was too fast with no acceleration curve.
More in-game sound effects would also be cool.