You (a cat) wake up inside a grassy ball with a gun. Onions start sprouting up from the ground and she has two choices: kill or be killed. Survive for 21 rounds to escape this grassy onion ridden hell.
Destroy the onions with tons guns and explosives
Power up with items
Shoot and kill the onions to gain points
Drop mystery gacha ball from the sky containing items and weapons
Jump on clouds to avoid the onions
Survive