its possible to run scripts on mobile wihtout root, although its not very intuitive either way, but it works just fine
you need to move manually download the autorun.lua and move it into tpts data folder

first, find the android folder, then navigate to android/data/uk.co.powdertoy.tpt
put it there, then close it, and reopen, the new script button is partial covered by the stamp but its neat that this is possible
i will give more info if needed in the replies
edit 1. this is getting quite a bit of traction, more then what i expected, neat