A game called Supersnake.io lets you play as a small snake at first. To get bigger and stronger, you eat food and other snakes.
How to play
However, you can turn your snake to the left or right with the A and S keys to go around obstacles or avoid them, and the W key will activate power-ups. Your snake will move forward on its own, and there is no way to stop it.
Have fun and good luck!