they need more vehicles and ....maybe a truck.small car.van.plane.skateboard,bull,hero(will fly/hover) ??? in circle.bomb (rolls) small circle,water,Sparta head ect.
*this is going to be my last comment on this game*make it so you have to do a number of kills then you will get the unlock..its kinda hard for me to get good combos
they should make it so when you run out of ammo...you will keep holding the gun that you were using....because when im placing barrels...it puts me to a pistol and i blow it up ( also killing me)