This is going to be a highly iterative process. It will involve sketching out some concepts, blocking out the environment, and play testing.
Here is the first pass.
These images are pretty big, so just click on the links to view them.
The WordPress gallery is overriding HTML code, so right click and Open in New Tab if you’re having issues viewing them full size. I’ll look into correcting this issue.
Level 1-1 – First Pass

UDK Blocking