LMAO, last level is not unbeatable guys. Just pay attention to everything available in the store. Ammunition is definitely a key factor as is choice of gun. Then use your common sense on the level.
Game is dominating my life, lol. To get past level 11 you just need a good sized team. Conserve your money and get the largest house you can buy and hire your partners. Atleast thats what I have to do. The farthest I've gone in this game is 24 days and thats using my laptops touchpad. I really wish I had a mouse.
This is a rip off of another game. The other game did not let you play in your internet browser though but it was multiplayer and far more complex. Still pretty decent.