Left and right arrow keys to rotate. space to shoot. Shoot the boss 10 times to kill it. Don't let anything touch the green wall. WARNING: USER MAY EXPERIENCE EXTREMER DIFFICULTY THAN ORIGINAL GAME Changes: Enemies are even faster, one life, and the base is trying to save money so the turret is even more imprecise.
Gameplay music: Unholy Insurgency by DM Dokuro Boss sprite: THE LORDE from the Calamity mod PS: I wanted a different thumbnail, but it never showed up. I guess this is good enough.
