Blue and red can't touch eachother, but they are both trying to go to your mouse. You can also drag them, but when you are doing that, you will not get points. There are powerups, freeze powerups freezes the ball it markes, but blue is resistant to cold, so it will last less, and speed powerups increase the speed of your ball. Red ball lasts longer in this state. Forgot to mention: difficulty increases! PS: challenge: 100 points