great game
needs to have more upgrades that are less costly... had to go thru tons of levels to get the uprade for airstrike needs new weapons, or attachments for taht weapon such as piercing bullets or grenade rounds or maybe larger bullets or faster shooting (coming with bigger clip size) other than taht it was great...but the next tutorial needs to be interactive... i didin't learn how to play until i played o.O i thot it was a sniper...