Your goal is to control the bug population and maintain natural balance in your back yard. You do this by catching bugs and feeding them to bats roaming above the wall
Click on a bug to trap it in a bubble. Once trapped you can drag it around and direct towards bats' mouths. Be careful, not to burst a bubble before it reaches one of the bats. In later levels use sonic traps to confuse and redirect bugs, and use smoke bombs to paralyze them for easy pick-ups later.