5 stars: Love this game only thing I would change would be the upgrade system.
4 stars: So far so good. Worth the $5.00 I've spent. I would love to see controller support. The need to pay to progress is a little heavy tho, I feel like I need to be rewarded more for my playtime instead of hitting a wall where the game wants me to get stronger by purchasing from the shop. Don't let this one be another hit it and quit it please.
4 stars: This is one where your alone with zombies of different types closing in around you and you get to level up all types of things. I knocked one star off because of how hard it is. It's extremely hard and it takes a long time to get your base level stronger.
3 stars: I would've been able to easily give this game 4/5 stars. However, recently the devs. increased the difficulty by 3x's minimum. Zombies that took 2 shots now take 8 !? Like why ? And it makes the grinding I'd done before the update irrelevant. So I no longer feel like playing. If I'm struggling like this, I can't imagine what it's like for those starting anew.
3 stars: This game is great, but it has a huge problem. Literally after level 1 the next stage becomes extremely hard to pass. Even with spending money. Also really needs an option to log into some kind of account. Like facebook or something
2 stars: Game keeps closing itself mid mission and forces me to restart my mission completely, the game is completely unplayable because of this, I'm only on 1-3 but it bug...