left and right arrow to move left or right. up arrow to rotate clock wise z to rotate anticlockwise Down arrow to move down faster Space bar to drop straight to the bottom.
I was not going to make a TETRIS game however after making 1010 deluxe https://scratch.mit.edu/projects/154802634/ I thought I would make Tetris. There were some challenges in setting rotation rules and also if a piece rotated or moved just as it dropped getting it to process that correctly. I think I have removed all the bugs. I hope you like it and if you have any suggestions for improving it or find anything you think is a bug please let me know.