There‘s a great gamer & game developer magazine called wireframe. Issue 12 contains a PICO-8 special.

Wireframe #12 PICO-8 Special

For some reason the PDF is free which is great. It‘s very much in the style of Edge magazine. Very polished & professional. It has great pointers for getting started. Check it out pico-people.

It is published by the Raspberry Pi foundation which is a non-profit to encourage programming!

Excellent design and editorial work, I loved it.