You can change planets using left arrow and right arrow and for the ball to fall, you click space. Also, try to see if you can find the easter egg, (the ball turns pink when activated), or try to find the secret (the ball turns green when activated, but is much rarer). By the way, in total, there are 3 easter eggs which lead to the ball changing into 3 different colours other than yellow. Try to find the other one that I didn't mention here.
For school...
