Sketch embed code feature?
Thank you again for sharing this project.
Depending on your goals for it (and your hosting situation), you might want to consider enabling sketch embedding -- so in addition to a url and a QR code, offering an embed code html snippet for cut-paste.
Then users could post their sketches directly -- or share them directly on forums such as the Processing forum. Currently editor.p5js.org, openprocessing.org, processingtogether.com, trinket.io, glitch.com, and codeguppy all do this -- although some of them have membership / funding models, and I don't know what the impact is on their hosting costs.
For a recent discussion of embeds in the forum, see:
https://discourse.processing.org/t/test-processing-web-sketch-embeds-on-this-forum/19097