Great twist on tetris! I liked the idea a lot and the game was very fun. Two remarks: 1) missed opportunity for the sound track to be some kind of remix of the iconic tetris theme. 2) Feels weird to end the game with a timer-- would feel more organic to end the game when the player gets too big and is stuck or something (but maybe have ways to get smaller for the player, like doing full rows like in tetris? idk, things to consider).
In the end a very creative one, 5/5 on innovation, good job there!