To see what's under one of the boxes, use the keyboard to press the letter that is written on the box.If you pick boxes that don't match, press 9,8,7,6,5 or 4. Every time you press 9,8,7,6,5,4 (because you picked boxes that don't match, of course, well anyway), then a diamond disappears.If all diamonds disappear then press the left arrow key if only 2 then press space key.
made by scratch-na!!!!Also to put back all cards then press up arrow key!