Puzzle Juggle Trouble

A stacking puzzle game where you get two increasingly terrible pieces at once. In this game, just like in regular Tetris, pieces fall from the sky. Unlike regular Tetris however, you are given multiple pieces at once, and you can swap between controlling one or another at any given time. You clear blocks by either making solid lines, or by filling square regions of at least 5 blocks by 5 blocks. The former increases the speed of the blocks' fall, the latter makes you move on