Have you seen the game Calculator on the (Apple) app store? Well, I remade that game into LowRes Coder. I don’t want to explain everything, but what you have to do is use the buttons on the screen to get your number to the goal number in a certain amount of moves. If you want to know more, try out this game of get it on the app store.
By the way, hints DO NOT work right now. Every thing else does, though.
Get LowRes Coder to use this program.