I believe this game is incorrectly tagged "strategy". There is no room for strategy. Not so much a maze defense as it is a "reset your upgrades after each level" defense.
There's a bug when placing fighter bays where it thinks that you're still trying to place them (after you've placed the first one) when you're just trying to select the ship for it to build.
Small feature that would be nice: To select a unit when you have another selected already, it would be nice if you didn't have to close the dialog box for the first one before selecting the second one.
Good game, but my serfs all keep leaving and there is no documentation/tutorial anywhere for me to look at for help. 4/5, but needs a much better tutorial, or at least some documentation in the game info.