To create the trees in the background (and the papyrus) I used the classes that were created for the game intro. Each tree is composed of a trunk, lianas and branches.
When a tree is generated, I randomly pick 3 to 6 of the 6 maximum branches and rotate them
around the point where they're attached to the trunk. I also scale and rotate the whole tree randomly.
I submitted Bennu for the PAX 10. I'm not expecting anything to come out of this, because there are bigger teams working on their games full-time and I'm just doing Bennu after work - I'm a programmer for a stock-broker.
The demo I sent featured the intro, the main menu and 7 levels, 3 from the "Lost Temple of Abu Simbel" area and 4 from "The Papyrus Swamps".
I expect Bennu to be ready this year if everything goes right.