Fun concept! I'm curious how many levels there are in this version; I had to stop before running out. Could really do with a volume control, though, and the art style consistently left me misjudging which space creatures were in.
It's really short for now, half of the levels are just the tutorial levels. XD
Adjusting the volume will be a good thing to include in a future update! I'll also try to make clearer they only occupy one square, making it the shape more visible in the ground. Thanks for the comment!