This looks great! I've been tinkering with a colonisation game in my head for ages, so I love seeing stuff like this.
I'm curious; How does the sandstorm work?
Can you tell more about the economy/resource system?
Sandstorm will "break" the buildings, so they will need to be repaired by colonists.
There are three type of resources.
The first type is required for the operation of the buildings(water/energy).
The second type are items which produced by buildings. Metal, which required for new buildings, components for build new pipes, food for feeding colonists and oxygen.
The last one - research points. This one needs for attract new colonists and also for buildings. You'll get it by analyze minerals from the surface.
Also, I saw you're at 80%. Demo/beta soon?
Thanks! No beta or demo, but it will come out quite soon. Somewhere in January.
What kind of obstacles to colonizing Mars are there? Any enemies? Fire hazards? Sandstorms tearing things up?
The usual Mars stuff: sandstorms, marsquakes, some space bandits, crazy colonists.