BugVac
Runs entirely in the browser: no install, no sign-up, on any phone.
About the game
Blue neon mosquitoes have escaped across the lab. You are the scientist with a handheld vacuum: drag your finger and it sucks in the nearest one; when the jar is full (5) carry it to the device to score. Upgrades: a wider nozzle, faster legs. They bite back: three bites means mutation and the end.
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.