If you play Poly Bridge 2 and looking for solutions for world 4 Sanguine Gulch, this guide will provide all challenges’ solution, let’s check it out. C4-1: Edgy Both hydraulics are contracting by 50% C4-2: Collision Warning C4-3: Sloped Drawbridge The middle hydraulics is contracting by 50%, the others are expanding by 50% C4-4: Trap Door…