So far this is one of my favorites as far as game design type stuff goes, I was actually pretty engaged with trying to figure out how everything works! Seeing that it’s only 51kb is also shocking to me.
The biggest place you can improve is to expand your description to make some stuff more evident. Do pumps need to be placed over acid? What do any of the buildings do or produce? How I increase quality to fulfill quest goals?
Overall though, this is the whole package. Small but still feels like a game, fun to play, title screen and music included; very well done!