Everything is a skin. Walk up to a wall and take off its surface. It comes away in one sheet and stays in your hand until you find somewhere to put it down.
Skins have different uses: A sheet of sky is the only light there is, and a bridge exists only where the sky can see it. Water holds you at any angle. Glass lets the light through. Concrete stops it.
Peel and place, one sheet at a time.
Engaging puzzles built on physical rules.
Places designed to be looked at as much as solved.
No hints.