I'M NOT RACIST I SWEAR! Arrows. Reach the top of the screen! The path will shrink and the player will speed up every level. DON'T TOUCH THE BLACK. IT WILL CONSUME YOU. Sometimes the level doesn't reach the top of the screen. If this happens, you'll either have to restart or go in the code and generate a new path.
This is a contest entry. It's also endless, and it was made in like 3 hours, so if you're expecting something cool or fun by any extent, sorry. Inpired by the Scary Maze on Itch.io You can see score history in the code.