Very unique concept, very well made.
I really love the idea of taking tetris and turning it into a puzzle platformer game, in fact i am surprised that no one came up with it earlier. The pixel art is very nice to the eye.
The music is good, don't get me wrong but it does get quite repetitve and slightly annoying when you get stuck on a puzzle, busting your brains out for different solutions. But overall, pretty darn good!