I guess this kind of thing is a tall order, but I have another up my sleeve, the littlest of little things:
This is Psychic World, another SMS platformer. For some reason, when you press forward while something is blocking your movement the player character Lucia looks back over her shoulder. When she does, the part in her hair remains on the same side of her head. Sadly, on SMS this doesn’t extend to her other sprites. The walking left sprite is just the walking right sprite mirrored. In the MSX2 original, Psycho World, though:
Not only is her part always on the right side of her head, she consistently casts a shadow to the right (when she’s standing, at least).