I'm surprised to see an automobile scene on the Algobox. I see that you are really creative with the track making.
But the car is acting like a Citroen so the suspension needs to be harder, i suggest placing more springs. And when you press the up arrow the car explodes and i don't know what that's good for.
Like others are saying, i would like categories in the Algobox, the categorizes could be: Vehicles, Marble races, Engineering, Weapons, Scrips etc.
Or to make it simple: Effort, No effort.
So you want to make the users get along with each other, without changing the Algobox. I think the only way to do this is that marble races only get to be uploaded on one day of the week, and no other scenes are allowed to be posted on that day.