I would like to join in, but anim8or doesn't run on this computer, so I would like to give a few points.
One, in the 1920-30s, we had WWI. The reason I mention is is we are, at this time using the old Vickers and such for weaponry. I understand that steampunk is the thing, but gunpowder was invented around they 800s (at least black powder anyway). Steam probably shouldn't be a way to power guns when the tech for gunpowder conserves the meteor from unnessesary use, when live brass is an effective way to use the native resources.
Two, Planes would also have a chance of being developed earlier with the effective source, assuming that a nuclear winter would take many years to disipate, everyone would have to have greenhouses with lights in them to grow crops. Steam would be very effective if they had the resources to run the boiler with no trees around, and therefore would hopefully be made more effiecent by necessity. Then the meteor for the new power source after its discovery. Part of the problems with plane developement was having a light, effective power source (like the small engine on the Wright Flyer). You have to carry your fuel... and water is heavy, so using less water for the engine is a good thing.
Three, did you know electricity was at one point a better power source than gas? Until gas engines were made efficient and small enough for use in cars, electricity was used very widely for the purpose. Electricity fell out of use due to the fact someone didn't find a super battery. The meteor could be use in power plants, and energy wired to homes, where the average person would use electricity for their vehicles and appliances. However, the military in the steampunk universe would want to use steam due to the fact refueling is stopping by the lake for two or so minutes instead of plugging in overnight.
Just a few things to think about... Nice work by the way... on what I could see.
