WASD to move Yellow Cat. Arrow Keys to move Red cat. Golden crystal gives you 10 points but the other crystals give one point. Avoid the hedgehogs as they reduce your points to 1 and will send you back to the starting place. If you hit each other than you get sent back to the starting place.
Started with using the arrow key tutorial from Scratch Tutorials.(In-website) This is a 2 player game but obviously can be played by yourself if desired.Play against people in you family or your friends. BTW single tap to move each time when playing with 2 people so that your device doesn't glitch.