Pretty good game.
Really nice graphics, although the environments certainly could use work. I liked the music, but it was blatantly obvious as to where the loop began and ended, and that kinda made it hard to listen to. Also, 1 second of the music spilled over into the main menu before stopping abruptly. I think the menu could do with some background music.
Perhaps you could also add the option to allow players to customize the controls on their keyboard if it doesn't suit them.
But other than all that, you have a game with plenty of potential.