Remember it's for kids really so it does start slow, but as I mentioned, it does get hectic so kids of all ages can get something out of it.
Every so often, one of the gonks will 'fart' When it does, the screen will start to fill with gas, blocking out your view. If you hit the gonk before he drops though, the gas will clear. The speed at which the gas fills the screen increases with the levels. Once the gas has reached 100% opacity, it stays there for 1 second, with nothing you can do to remove it!
I did intend on making a hi score table, or at the very least just saving the hi score and the players name (rather than a full table) but I've ran out of events I can use in the free version. :( Another reason I need to get a license (I'm still saving for it!)
Let me know what you think. If you spot any bugs/problems please point them out so I can have a look.
See if you can get past level 15, that's all I've managed so far!
Here's the link - Bonk The Gonk!
A couple of screenshots.