Support multiple Snake Colors

[phanthaiduong22]

Background:

I want to make snake_color more colorful, so I’d like to try creating a PR to get some feedback

Demo

[phanthaiduong22]

Hi @Platane, when you have time, could you take a look and let me know if this idea is okay?

I also have some additional ideas and would like to get your feedback to see if we can apply them as well:

1. Expose an option to customize snakeSize.
2. Add an icon for the snake's head.
3. Currently, the color changes every few seconds, but another idea to make the snake more colorful is: on each second, render each cell of the snake with a different random color.