Jellyfish — free browser game

You are a jellyfish drifting in a dark sea, slowly pulled down by gravity. You have a single button, but it does two things at once: a quick bell contraction propels you upward, and at the same moment a bioluminescent ring spreads around you. Fish caught in the ring freeze for 1.2 seconds, turn cool blue, and gently sink — colliding with a frozen fish doesn't kill you; you swallow it for +5. Touching an unfrozen fish ends the run. Tiny yellow krill drifting in from the right are always safe to eat and give +1. There is a short cooldown between pulses (~½ second); pressing during cooldown flashes the screen red and skips the stun but still won't propel you with full strength. Strategy: don't waste pulses on a single fish — wait until two or three converge, then pulse to lift away AND turn them all into prey at once. Spending too long near the bottom exposes you to faster, less predictable fish. Difficulty ramps as time passes; your best score is saved in the browser.