I fully plan on cranking out a very short grunge-fantasy romp just to try the engine, then return to Ace so that my gam mak partner doesn't get mad at me. Currently humming and hahhing over the name CHAINSAW BATTLE PARTY but that's subject to change. Mostly depends on what scifi weapons are available -- there are a lot of awesome icons, but we don't know which actual sideview weapon graphics are available for the scifi stuff.
I just successfully tested changing music by region, and changing it between continents on the world map after getting on/off the airship. I had to override the default audio transitions with eventing to make it change smoothly but it worked.