Use the mouse and arrow keys.
4 modes lised below.
Challenge, Survival, Follow, and 2 player.

Challenge:
Collect the green circles do not touch the purple squares.
Survival:
A massive amount of green balls fall from the sky collect them, to not hit the squares.
Follow:
you are the follower, Follow the mouse and see how hard it is to be the follower. touch the muose to get points.
2 player mode:
2 player following! second player follows the mouse player 1 controls. Then it switches. Player 2 controls with arrows, player 1 with WASD keys. touch the mouse to get points.