i like the puzzle and how you start with minimum movement and you learn more stuff on the way.
only a small issue, if you play the game in full screen you can't leave the game xD
Um.. if your'e playing on web browser you should be able to minimize with Esc, if not then hit 'Q' in the game and the 'Quit' button in the main menu. this should do the trick (if everything is working correctly) :)
