Description:Stop and annihilate all of the robots who came from other
planets and wanted to occupy the earth.
Instructions: p1: W/S/A/D to move,J to fire,K to skills;P2: ↑/↓/←/→
to move,key 1 to fire,key 2 to skills
Iron Man skills: K/2 to sprint.
Captain America skills: K/2 to parry.
Hulk skills: K/2 to jump.