Good work, but you can not call that tetris
If you pay attention to actual tetris you'd know that its 10 squares wide. All tetris games are 10 wide. Another tetris rule that you didnt follow would be that when the piece hit another piece or the bottom, they instantly stop. In tetris you can rotate and move a piece even after it has touched withing a certain time limit. I'm sure you've heard of the problems of the blocks fusing together if you run them into eachother sideways. I know some of these problems you could not get around, so with the restrictions you worked under good job.