Description:
Grey Matter is a shooter, an anti-shooter. This is a shooter without spitting bullets. For the most part, you are the bullet. You got into the exposed brains of incoming attackers, destroy them. If you manage to kill the three types of enemy, it will cause a "Trinity attack". It kills everything inside of it. You must avoid enemy dangers like flashing bullet, tails, teeth and lots of lazers.

Instructions:
Move: Arrows
Boost: Space
Slow: Shift