Fun... but...
There seems to be a LOT of glitches, as soon as I started the game, I had infinite ammo. When I finally beat everything and upgraded my guys, I didn't get the award or medal, even though they were all 100%, and since I had infinite ammo already, I couldn't get the "buy as much as you can from the shop" award. Because of these glitches, at first I couldn't get all the medals/awards/rewards. After I refreshed, I could go to the shop and buy all the weapons, and I decreased all my guys and increased them again, and everything worked, luckily.
tl;dr glitches, fairly fun but gets repetitive. Also because of the glitches giving you infinte ammo at the beginning, it gets boring quick.