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.
Don't forget once trapped in a bubble, you can drag them towards bats' mouths.
Becomes more fun after level 3-4 with more traps/bombs to use.
You can place smoke bombs directly over cracks and set timer to o.2 sec. to explode as soon as they start crawling out, or 1-2 seconds if you want to use other traps/repellants to direct more bugs towards smoke bombs.