@damainman well Windows 7 takes it well, so I think 8 should too. I found the game didn't need too fast of a PC, but it seems the sound bug was when too many channels were playing every couple of seconds, it wasn't unloading them fast enough I guess.
@Urled, hmm, I haven't used Z elevation much in my game, but I do use it every loop. I'll avoid it for the next engine.
Yeah, I would definitely like to make everything moddable in the game. The idea was that it's an icon and there will be a machine above it, but I never finished all the objects and game components yet.
I've thought about 3D, I think the next engine will still be top-down but allow for z-movements like jumping over objects and changing building floors.