Not bad!

Yes, it´s simple, but I played at least some minutes with a lot of fun!
But some improvements could be made:
+ a highscore would be great
+ moving the numbers left and right to have a bit more tetris

But all in all not bad!

Good!

I like Tetris a lot and we could do with practicing our quick number skills.

I spent I while failing to get it to work before noticing your note about getting the cursor in the box! If a lot of stupid people like me have trouble with that you may have to put a note on the screen on the game
"Enter your answer HERE:"

kinda retarded

if we wanted educational math games we would go to preschool