Rainbow Friends Survival is a shooting game where your mission is to shoot all incoming rainbow friends using different weapons, try to survive each level in order to unlock new guns.
https://www.gamearter.com/game/rainbow-friends-survival/
WASD – Move. LMB – Shoot. RMB – Aim. Mouse Wheel – Change weapon. R – Reload. Space – Jump. P – Pause.
https://www.gamearter.com/game/rainbow-friends-survival/