It's old but it's a fun game where you can watch your city. Different kind of RTS. I can't think of many other games that are like this.

If you learn the controls this game is good for an indie game. You have to know when to fire, which gun, and when to dodge. There's also an interesting shield mechanic where if you have enough energy (getting coins from killing things gets you more energy) you can turn on the shield which makes you invincible for a few seconds but then leaves you super saiyan (purple) protecting you from destruction as long as you have enough energy to absorb the bullet hitting you and stay in super saiyan mode. Your energy gradually depletes on its own while you are in this mode. If you get coins they charge your energy but they do not make it last forever no matter how many you get. In fact, it only charges to a full bar and then it stops charging so you can't even save up energy very long. Once it wears out you have some crucial seconds of vulnerability where any coins you get are unable to charge you.

For $5 this is a good game for your kids or for the kid in you. It's got a good sense of humor and good writing. The bonus level gets tedious but it's definitely worth supporting.