Cute graphics, fitting music and brilliant gameplay... Definitely one of the best entries in this jam! It's really impressive how you managed to build such a gripping game around just two buttons: easy to learn but hard to master. It's really quite difficult not to get fired at first, but once you start getting into the groove of things, it's so rewarding.
My only nitpick is that the game seems to be running at a higher resolution than the GameBoy's 160x144 (whilst keeping the same aspect ratio), as everything moves so incredibly smoothly. Of course, I could be wrong, in which case... kudos for deceiving my eye! But if I'm not, this is nonetheless a stellar entry which everyone should play at least once. Excellent job!