Use the left and right arrow keys to turn. Use the up and down arrow keys to go backwards and forwards (not up and down!). Avoid tetris blocks and have fun! WASD works too!
It may not be the most professional game, as there may be delays between block spawning and blocks stick to the wall until they spawn again. The easy mode here: https://scratch.mit.edu/projects/169400917/#player NOTE- easy mode controls are a little different