As a...sort of city-builder/tower defense game, it's kinda fun. It never gets particularly exciting, but getting to design your layout for your city in order to rotate it around and deal with waves of enemies is interesting.

If there's one issue that weighs heavily, it's that the game doesn't let you access useful info (as far as I could tell) like the help topics once you're in the planning and combat stages, which means that if you put the game off for a while and came back to it like I did after already building into your second city, you get to experience the fun of trying to remember how things work if you didn't read all the necessary help topics again from the command console.

If you told me this game was built for mobile originally, I'd believe it. The hook is there, but it's not deep enough to keep me invested when I'm multiple cities deep.