Link up to Flappy Bird Tutorial?

[ericclack]

At Coder Dojo Brighton we've created a few Pygame Zero tutorials using the Mu editor. These are tried and tested over the past few years with 8+ year olds and work well. They are slow paced and relatively easy to follow.

Would you be willing to add a few to the resources/tutorials page here?
https://pygame-zero.readthedocs.io/en/latest/resources.html

I think this is probably the best one for beginners:
https://pygamezero-bird.readthedocs.io/en/latest/

Then we also have:
https://pygamezero-burgers.readthedocs.io/en/latest/
https://pygamezero-candy.readthedocs.io/en/latest/
https://pygamezero-pacman.readthedocs.io/en/latest/

If you agree I'm happy to create a pull request.