Arrow keys to move the blocks. Down makes the block fall more. Z/X to rotate the blocks. C to "enter the zone". Space to hold. Have fun! The goal is to maneuver the falling block pieces to create filled rows. This gets you points. If blocks stack all the way to the top of the screen, you lose. When "in the zone", full rows don't clear. They instead just go to the very bottom. After the zone is over or you "game over", the rows all clear at once.
Fun fact: it's perfectly possible to get a Vigintris. I did it myself. My high score is 1,080,928. Thanks to Wes64 for making probably the best and most modifiable version of Tetris on Scratch.
