[tmaxxcar]

My understanding is that with PICO-8 you can export to HTML5. If this is the case, (I haven't used this myself.. Yet.) why would you need direct support for mobile and Pi's? Couldn't you just change the dimensions of the app to fit mobile devices, and take advantage of the HTML5 support while on a Pi?

[Temjin]

You can run PICO-8 games on a phone browser, but there are no virtual buttons for touchscreens, yet.

Pi is just a bit too slow to run the JS engine, it needs to be ported to native ARM for full speed.