Haven’t run a full LN3- yet, so this is about how the hide rule reads rather than a full level report.
“Stand still against a wall of the same colour” is a lovely verb, but first-timers will blame the guard path before they blame the colour match. I’d make level 1 force one intentional fail: stand against the wrong colour once, get spotted, then succeed on the matching wall with no extra text. That single contrast teaches the rule faster than a How to play panel.
On phone, keep the “same colour” walls a solid shape change (stripe / hatch), not only a hue shift — neon-on-neon fails in sunlight and the hide verb disappears. Guards that only move when you move are clear if the first “still” beat has a visible breath or idle, so standing still doesn’t feel like a frozen bug.
One honest line after you stop (plus the LN3- if you’ve got it) is already gold. Happy hunting in the circus.