The game has no quit button, you might want to add one, haha.
Other than that, cute little concept, though like the other commenter said, the controls are a bit awkward. You could consider using the arrow keys since there are four of them instead!
As far as the art goes, you might want to consider working with premade assets, since the quality here was a bit rough, but it got the message across (heh) so that's fine.