This game is surprisingly addicting, and there are actually a few tricks to it believe it or not that you can exploit to your advantage. Simple concept, simple designs, but man is it worth your time for at least one game. Hey, effectiveness through simplicity instantly wins my vote.
Plus, the chain reaction is not just in the game, you'll find yourself clicking the "replay" button dozens of times before you're done. You won't want to stop until you get at least one good long-lasting series of BOOMs!
Plus, the concept of shattering explosions and taking down UFO's in a seemingly post-apocalyptic world is always a recipe for constant replays.
Make sure to use ALL of your ammo, and...wait a second...3rd Place? Me? Oh, I'm so HAPPY! Hooray.