Like the music, style and inclusion of game pad support.
Controls feel like they aren't accurate enough for some of the sections.
I would like more control over how high the initial jump takes me based on how long I press the button.
I also feel that the movement is just slightly too fast, contributing to the lack of accuracy.
Another thing I noted was there is a rat much higher up in the level that tells you how to move left and right with A and D. I don't think that makes much sense since you would have to know that to get there.
I didn't know that I was able to double jump until I happened to press jump mid-air on accident.
Other than that I would say this is a solid game.