Your task in this skill game is to fill the required % of the screen with color. Click the LEFT MOUSE BUTTON to start a reaction somewhere. When balls hit a reaction they react as well filling more of the screen. Your fill meter in the top right corner shows how much of the screen you have filled. If you reach level 5 the negative balls will appear. They destroy any part of your reaction they touch. Click on them to destroy them. Starting level 8 the positive balls appear, click them to start another reaction. Good luck!