Material — the paved default: Sprites/Default (or URP particle-unlit explicitly set to Transparent) tinted from the palette; the failure table below has the two traps. Additive/glow sparingly and only ...
Expert level in 2D means feel and pixels are measured, not eyeballed: a jump has a height in tiles and a coyote window in ticks, a camera has a lag in pixels, a pixel-art screen has an integer factor ...