Castle Rush 2D is a fun, simple, casual game where you play as the cannon firiing players to reach enemie;s castle trying to defend your Cannon from a fierce enemy. The enemy, an invading army, have been threatening your Cannon and have decided to attack your Cannon. You have to build up your castle's defenses by Tapping the cannon to produce more green defenders and spawn them on the correct calculated place so you can increase the green defenders into mathamatical calculation.