His own Newgrounds car, to drive around the streets of Philly, advertising his site wherever he goes.

I suspect that said car should be Newgrounds-themed (duh), with a #25272D body and #00CCDD trim. Now only if paint jobs use hexadecimal colors...

It should also have some Newgrounds decals plastered on it, like the tank. I reckon they're pretty cheap to slap on, and should stay on reasonably well.

Or, heck, why not the tank itself be the car he's driving?

...I'm thinking a two-seater kart sounds mighty fine. Don't you?