Ok so what you need are a bunch of unfix cubes,cardboard bricks boxes and any number of made up teams with a animal in the name.
Make a base out of the cardboard bricks boxes (or anything close to them.), The base must have a gate of some sort that closes manually.
You must make 5 characters out of unfix cubes,
The two guys in front of the brown guy and the guy in the chair are guards. The man in the chair is the king ,the man standing beside the chair is the mage/witch doctor and the big head guy is their mascot (frog) The chair is obviously the throne. (discuss the lazy character design below) The rest of the unfix cubes shall be used to make projectiles. Here is the base
open
closed.
The main goal of the game is to kill the king. The guards are to protect him for the blast. The mage/witch doctor is to create golems and heal guards. Once a guard is knocked down you must close the gates and but the guards inside. The mascot must stand on top of the base with two special projectiles. Once the mascot is knocked down ten times you can use the special projectile. Once the king dies you must reset if you have any questions ask away. I will also leave more images.
EDIT: sling shot required to fire at the enemy base.