[AlexH]

From what I've read isn't he still in the process of making new graphics for it still?
New levels shouldn't really be made untill you get the final tileset otherwise you could have to spend a lot of time redoing some levels. Although depending on how much he changes it affects this.
Scripts and graphics I suppose he could do with some help, only problem with that is that you may end up with a lot of different styles which may not fit nicely together.