Spring RTS Engine

Also, just to clarify, that means I can't even do anything like have a bridge and have units move on the bridge and underneath it, right?

Thanks for the quick reply. The first two answers are good, though the last one is disappointing. I'll have to take a look into to what it would take to implement that.

1) Does Spring have destructible environments?
2) Does Spring have variable game speeds?
3) Have a map inside a building with multiple levels like a two story home?

Thanks in advance.