Memory Game! This one is tricky, though. There will be 11 different numbers that will show, then after a few seconds, hide, consecutively. After that happens, there will only be 10 numbers out of the 11 that show. You have to know what the other number is!
Credit to @PullJosh, for his memory game is similar to this project. Credit to @McAnimator3D, for the cool font for the numbers. Instructions are also in the game.