One of the MOST difficult games I've ever played on NG!! Plenty of levels with gradually increasing difficulty, with an entirely new concept that makes you really concentrate every time you make a move. Very well thought-out game with simple but effective graphics that work well and make for an enjoyable game that will keep you on your toes for hours or--if you're anything like me--DAYS! I like that there was a mute button, because I hate any music with games simply because it's not my thing.
I'd love if you made a sequel with even more graphics, because this game (although frustratingly difficult at times) was a lot of fun. Nice work!