Been using this on my second space age save, really neat port, good job! Would be pretty funny to get the other classes even if we are an engineer.
thank you :) perhaps one day I will write scripts to render the sprites automatically, like the factorio devs do. at that point other classes would be definitely be feasible, but at the moment it's very time intensive and would take too long. no promises either way, but glad to hear you're enjoying it :)