This is awesome. I played this for waaaaaaay longer than I was expecting. The music and presentation are great. My only constructive criticism is that there might be some better ways to prevent the player from having to reload the pieces over and over to get out of a bad spot (something like a shuffled deck of pieces so you don't get duplicates over and over, the ability to store a piece for later, the ability to rotate pieces for a cost of some sort, something to limit the long tendrils that can be a pain to squash back down, etc.). Fantastic stuff.