This is a really great idea. I had fun. Kept hitting the spacebar thinking it was for jump and wound up switching games by accident.
my advice is to just take your time haha
All i have to say is the creator! you rock i appreciate all your hard work on making this game IS SO EPIC THANK YOU FOR CREATING THIS GAME who knew tertis and mario can mix?! no one expected this thank you a lot I MEAN IT!..............AAHHH THE EPICNESS!
I seriously didn't expect this. There is nothing possibly more innovative than this.
The only suggestion I dare say is to make the screen smaller. I know you need it for the tetris game, but it is quite hard to see the mario game.