This game is pretty simple. You just have to control the green ball and stay on the screen for as long as possible, and don't get bumped off the screen by the red and orange balls, but be aware that the orange balls will explode when the counter hits zero. And to earn extra points you must stay inside the quad circle.
Arrow keys or W, A, S, D - move the ball.
"P" - pause the game
"ESC" - quit back to the menu