Paper Bridge Physics is a lightweight construction puzzle game about turning fragile materials into stable crossings. Connect paper beams, cardboard beams, folded supports, and tape reinforcements between canyon anchors while staying within a limited material budget. Each test estimates stability from strength, span, triangle support, weight, and pressure before sending a small cart across the bridge. Later stages demand longer spans, tighter budgets, and higher loads. The game includes local bridge challenges, physics-style feedback, advertising support, and no in-app purchases.