I don't think I touched most of it, but as a dumbass kid who didn't know how to code yet, I remember taking advantage of: - layers - keyframes: you could mark

I don't think I touched most of it, but as a dumbass kid who didn't know how to code yet, I remember taking advantage of: - layers - keyframes: you could mark frames as keyframes (per layer, I think?) and then "tween" the contents which would handle animating the movement (and maybe other transforms?) from one key frame to another - action script for interactivity