Good fun. I discovered a big though. I could not yet reproduce it, but I managed to somehow have letters glitch out of the Tetris shapes they are in. When I move the tiles or rotate them, the letters are back where they should be. So it's not game breaking, but seems to happen in some case. At first I suspected, that it was because my phone was locked in between, but I tried that and when locking it manually, that bug did not happen. So no idea, sorry!