SwingDog
Runs entirely in the browser: no install, no sign-up, on any phone.
About the game
A ninja course made of hanging tyres: a dog in a red headband swings on a ring, and a tap at the right moment lets go and sends him flying. Tap in mid-air for flips (+25 style, up to two), then catch the next ring — dead centre is PERFECT +50. The course drifts left, so hanging around is not an option. One miss and you land on the mats.
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.