Interesting game. My only qualm is that I wish keyboard controls were mentioned in the tutorial, as I didn't understand what other keys were available other than the bottom arrow keys (and then I found out ASD are also usable); I found myself tapping Z, X, and C to try to find how to rotate the block. I found it a bit odd that Space Bar was used for almost everything except for stage selection, which required Enter; it'd be nice if Space Bar could double up on that.