Poly is a newly-released, hard-as-nails runner where the twist is that you don't play as the runner – you play as the world around them. The idea is that you'll spin the level to keep a little ball bouncing along a series of small platforms inside a strange portal.
It's said to be unbelievably punishing, requiring rapid reaction times and a mastery of the game's simple controls to survive, firing up "emotions filled with anger and powerlessness". In fact, Poly was tested with a number of players who managed 5775 attempts. Of those attempts, only 7.1% were successful.
If you happen to get hooked, you can take on your friends' high-scores and attempts to climb the worldwide leaderboard. There are also a number of different runners to collect, keeping completionists busy.