Stop of dreaming, sorry to take illusions off.

GodGames is in bankrupt as Newspaz says, true, there is a beta demo and yes, the source can be extracted of it because it's Unreal engine, just Unreal Scripting which is similar to C.

But even if we had the knowledges to continue, we couldn't, since World Tree Games has to allow that, meanwhile, it would be fine if World Tree Games could release the demo, even if incomplete, so all the ppl here would see it.
I mailed Jason Emery once the last year and he said that the team wasn't supposed to give it out.

For now you can get my soundtrack that can be found in my signature if you want something from Jazz Jackrabbit 3 since I got all the songs of the game.