Excellent game!
Suggestions:
- Need progress saves, no fancy stuff as in in mission saves, just save campaign progress so if you leave game for some reason you can continue from last finished mission.
- MORE!!! levels.
- Maybe even random generated map vs AI? Even if its like in campaign mode, no serous bases, just outpost. Like sand box mode of sorts.
- make power/water outlets at buildings not blue, they kinda hard to see if you place many buildings side by side. Yellow power, dark blue water?
- More building upgrades.
- Maybe toss in some research options?
- Game tops when in menus, why not add pause mode? For building placement planing?
- Building rotation, many say its needed but I think not, its part of challenge for better pipe/wire placement...
You have a gem here... mobile market is a way to go, aim for tablets (iOS/Android, don't think its gonna work on mobile phones due to screen size) and you can make some serous profit I think.
 "Mars Colonies Demo"){kind=icon}