hahA when the boss music kicked in that got so intense. I think the mechanic is pretty nice, like the other comments the learning curve could have been smoothed out (but that's just testing). I like how at the start the first level is really simple so that users know what to do! Also, in the last level I think that it would have been nice if it was more clear the entire border could be moved -- I think it's cause the game built up the "rule" that wall tiles can't move, and then they move at the end. A twist! Either way, great job on your game!