Feesh

Feesh is a minimalist arcade game where you play as a tiny microorganism that resembles a fish. The mechanic is simple; eat smaller feesh to get bigger, and avoid being eaten by bigger feesh.

Certain feesh have special abilities; Red ones make you smaller, and the jellyfeesh can sting you. Survive long enough, and you'll evolve! But try not to get naturally selected. And watch out for sharks.