This was an interesting, though somewhat frustrating game. It took me a while to get a hang of the controls, and even then I didn't always feel like I was in control. Having the block's momentum reset on the swap is interesting, but also feels kinda clunky in a way. I'm not sure I'd prefer the alternative, though. Also, since so much of the game is about timing (waiting for gravity to move the block far enough), having the levels auto-start seems like a bad idea. It would be nice if the game gave me a moment to look at the level before things started moving.