If you are in for a hard challenge, one of the many options include descend. IN the game you are falling and avoiding walls, and other obstacles.

This is a relatively simple concept, but only one out of the many people that have played it (mainly during development) have completed it - the main developer. Most people don't get past level 5. There are only 8 levels, but once you master the game you can try time mode - a hard corse with only around 15 seconds to complete. 

Download  at https://gamechimp.itch.io/descend.

Good Luck!