If you upgrade your sniper tower or cannon, it would make the machine some what better like it would fire faster or it would take longer to defeat. But if you mean by what prize do you get, you would get goo, putty, sticks or stones.
backyard monsters hacked
There is no monster bunker on backyard monsters!
Backyard Monsters is a game that can be played on Facebook.
Yes there are hacks for backyard monsters but you need to download cheat engine.
Put them in your bunker.
Try Edgeworld on facebook. It's just like backyard monsters Except that their are no monsters, Its a sci-fi game.
To protect yourself from monsters your not supposed to attack them
D.a.v.e
No there isn't
Just build a "MONSTER JUICER"
backyard monster favorite
pasword backyard monster hack tool