Note that (atleast on mobile) they changed the SPNG description from "Not a moving solid." to "[A] Moving solid."
Flags were a once used condition for pixels! Eventally nothing really used them, and so we are in a universe that Pacmanfan123 doesn't know about them.
@pacmanfan123 Set flags to 8, then use vx/vy
Make a wall of GBMB for it to trespass.
that one pixel (crying face)