A really nice twist to the classic chess with a bit of cute story to it, really loved it. The levels were clever and the mechanics were easy to understand if you knew chess before and also the hint button is a good touch. Also the ability to change characters made a really nice potential for different and interesting levels!
Just two critiques: the first being that the music was a bit dull and after a while became boring to listen to, but that might be my tastes, I like more dynamic music; the other thing is that sometimes I wasn't able to distinguish the playable tower from the non playable ones, I think that adding eyes to playable characters would have been better than adding them at random.