Source idea

Stick figures, basic as hell.
Rainbow shooting out for blood.
Unicorn boss.
Tanks, shrinking down Mario style to get into them. R/c sized tanks.
Game goal destroying the enemy's base, Red VS Blue
Base a destructable entity with a lot of HP similar to a RTS base




World of Tanks clone

Airplanes
Tanks
Infantry
R/C sized everything to accomidate Source's limited maps.
Destroyable objects that give points
Base capture