
Not putting fusion hulks on the secret levels in this game could be a very good idea. And I think you might find you want a few more levels to explore fusion hulk combinations with robots from D2 and vertigo like E-Bandit or MAX who will make him even worse -- D1 never really used him that way.
What I really want to see is a way to either be able to create exit sequences for these mines or use the FMV's from D2 and D1 PSX.
A couple questions on the level front --
As far as solar system goes it would be cool to have more than one Mars level since that texture scheme was pretty unique in Descent 1 and Descent 2 didn't really do anything like it even on Brimspark. Maybe I can try to make something similar for the Vertigo section...
I'm also not sure about "litter jungle" as the Neptune level because without the trigger puzzle it's actually really short, and I feel like if there's only one Neptune level in the mission it should be a long one (at least, long for level 9). If that one was moved to Beta Ceti it could keep the extra length it gets out of the puzzle as well.
Getting back to the music for a second; I've made a couple of tentative decisions (besides the ones for Big Red and Inside Out which you already know

Big Red is another one that could get a re-use since it's got that ominous feeling and it would work well for something darker than Ceres.
There's another song I wrote two months ago called Snarl that I've been toying around with having on the Neptune level since the song mentions Neptune in it several times. And the style... doesn't not work.
