My script won't work to add a Billboard GUI when you press m.
BillboardGuis are designed in a weird way, so you have to take care of a few "gotchas" if you want interactions to work. Namely:
1.) Put it in a PlayerGui and not under the Part if you want interactions.
2.) Also, you need to make sure that all sizes are large enough (default is 0,0 for the billboard gui, which will make it so that even though you can see your gui, you won't be able to click on it).
3.) It must also be active and visible, of course, and not hidden under some other gui that can steal away the click.
That should do it.