A few tips to make this a better game. The teleporting really is a bad thing. Have mouse moving create a path for the ball to go to rather than following the mouse pixel for pixel even if the ball travels across this path instantly, (move it the balls diameter in pixels, setInterval(moveBall, 0)) this would cause the ball to travel along the playing field and possibly interact with a red ball. Also, add a timer. I would like to see when the next ball will be coming. And complicate it a bit. Have variable speed balls, or obstacles.
Good concept though. This game has good potential.
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