Was going to attempt to make a custom platform movement for another game concept I was thinking of, but without using extensions since in my experience, they tend to crash.
I came up with something that moved the player one pixel at a time, though via Fastloops, so that if it collided with a wall, it'd be pressed up against it instead of being several pixels off. (As in, if it's moving at a speed of 5 pixels per frame, and it collides with a wall, the Fastloop will have it stop against the wall instead of 4 pixels away).
Now I'm also wanting to do that for enemies eventually, but I got to thinking. Would that kill performance if I put a bunch of enemies' movements in a bunch of Fastloops while also within For Each loops as well? Or is there an easier, extension-less example out there that'd have that kind of pixel precision?