Good game, but one problem is that if you simply hold down the right mouse button for the charge shot and keep holding it, it still kills swarmlings. So you can kind of just hold down the charge shot without firing it and cheat at the game. That's the only problem I seemed to have found with it.
Okay, seriously. I am level 30, almost 31, and I even have the Inferno backyard. And the lag is just TERRIBLE! Whenever I move, I get this weird purple-ish thing that's jerky and unpleasant. Seriously, fix this lag, and it's not my computer, because i've never even waited on a youtube video to load. Fix this, or you'll end up losing customers and eventually just piss people off.
Here are the weapons used to kill him: The chair the boy is sitting on, the scissors in the cup, the pen next to the cup with the scissors, the stapler next to the cup with scissors, the jar of bugs, the pesticide in front of the desk, the flagon located northwest of the pesticide, the book next to the globe, and the backpack. There are also three weapons for Box10, which is the baseball bat, pot of flowers, and umbrella. + if this helped you. :)
Note, if you beat the game before the badge came out, just go to chapter selection on the main menu, click the last chapter, and play the last level. If you have already completed to bonus missions, you'll get the badge.
I think that, instead of just vanishing after cheese. You should be able to replay the level over and over, as many times as you can until the clock runs out. It will stop trolling, and you can get cheese a bit easier.