Medusarium
Runs entirely in the browser: no install, no sign-up, on any phone.
About the game
You are a jellyfish. Your food fears movement: freeze, build up «silence», release a glowing lure — and let the plankton, shrimp and little fish swim into your tentacles themselves. Eat and grow; from the third size on, the reef sends a predator that can only see MOVEMENT.
How to play
Open the game and start right away — no install, no account. On a computer use the mouse or arrow keys, on a phone just tap. Your result is stored on your own device.