buggy
If you sell a building that requires civilians you don't get the civilians back... if you sell a building that produces civilians you lose civilians though... so you end up in a state eventually with an impossible number of non-recoverable negative civilians and you cannot do anything.
This is just one bug of the dozens I encountered in just 5 minutes of playing. I can't see any reason to play this longer than 5 minutes unless the entire game is completely reworked. Please spend time working out your basic game mechanics before you put so much effort into graphics and finer details.