Nice game. Simple but effective and working. As others have noted, the movement felt a little unrefined, but in a way that only contributed to the challenge of the game. Plenty of games use trickier character motion to add to the challenge, and it's not necessarily a bad thing. The levels felt a bit simple, but with the movement being what it was, that simplicity did not detract from the experience.
Great work, and nice choice in music too