Player 1: use WAD to move, S to equip armour Player 2: use arrows to move, down arrow to equip armour Two Timers on the left, and right corners of the screen. when it says ready, you may activate the armour. Then, it will count to 20 and then your armour will disappear. This process is repeated. Armour will decrease the amount of knockback you take. Guns will be strong enough to push you back a bit.
credits to @fsdffadg for helping me find the idea