Spiky, colorful sea urchins are floating peacefully in the calm, blue water, and you're here to blow them up. Click on a sea urchin and watch it explode and shoot spikes out that hit the nearby urchins and cause a chain reaction. In each level, you have a limited number of clicks and time. Figure out which urchins to click in order to make all the urchins explode in the fewest possible moves. Start with just two red urchins. Then move onto more difficult levels with different colored urchins that need to be hit more than once. Eliminate all the urchins to beat each level and keep playing.