This is inspired by netgrind's SSSnake series (which was made into the compilation game Snakes on a Cartesian Plane). It was also primarily inspired by the "dreams" in Run, as well as DefeatMe.

Eat the yellow squares. Eating two yellow squares will create a new snake for you to control, turning the old snake into a looping obstacle.

Controls:

Arrows - direct the snake. You can wrap around the screen.
Other keys - press when you die to restart.

The walls will now shoot you out the one to it's right