The last level is just really going to be a shooting-fest. This is in contrast to Levels 4 and 5, which had more of a focus on platforming. In the end, you'll have the final showdown with Commander Awesome.
I'm going to be putting alot of work into the game this weekend, and the whole thing will probably be finished next week.
The truth is, I'm really anxious to enter 4E5, but if I want to compete, I think I will need to get started on my entry. However, Stompy will be finished just like it would even if I wasn't entering the contest.