Like the game but upset that are higher levels you need tokens to unlock stalls, feeders, etc. Fine to charge for games like Ballon TD but let the gamers achieve it another way.
Really nice and like the story. Bad parts - Don't like the loading on part 3 & 4. Make sure to check fast mode or else it is a bit slow. I had no lag and the videos loaded up really quick.
Finally got Hard. Keep restarting the game until you get one that has a lab, suburb, hospital next to your squares. Capture those three (suburbs first), research binoculars and don't scout until then but send soldiers to kill everything and recruit whoever is next to you. Then go kill them zombies and research as much as possible. Saves a lot from those random events. Also helps to be a bit lucky:)
Beat the game at a lower score than when I lost and got 80K. You get the same ending, I know its history so you can't change it but maybe toss a video or or a song ala nerdook.