Offers nothing new.
Just another Tetris clone. When one does Tetris, they should add new things to help stand out from the original Tetris and other knock-offs. Add power-ups like an instant screen clearing item for example. Add new modes like a puzzle mode that has you trying to clear the screen in a limited amount of moves.
Hell, throw some bosses in there that can only be beaten by scoring Tetris's (clear 4 lines or more at once). Otherwise the bosses will throw junk blocks to fill up your playing field faster if you take too long in beating them.