Pretty cool game, nice application of the theme. I've read in your game's description about the lack of time you had to polish the game, so I won't complain about the length (although I really would have liked to see more). I really like the piwel art, reminds of the old Atari games, and artstyle that I personally adore. I thought at first that the level design was a bit lackluster, until I ended up having my first loss because I was too reckless. The difficulty is neither too high nor too low, something that I definitely appreciate in puzzle games (I completely suck at these ^^)
You really should take more time to add more content and upload it somewhere, so that more people can enjoy it too. I really like it, and I would like to see its full potential. NIce job! :)