Poly Bridge Build it, watch it wobble

Every level gives you a gap, a vehicle and a budget. You draw the structure yourself: road deck first, then beams, cables and supports underneath, choosing between cheap wood and sturdy steel as the money runs out. Hit simulate and the physics take over. A bridge that looked solid can sag, wobble and fold the moment a car rolls on, and watching exactly where it gives way tells you what to fix. The game shows stress on every piece, so you can see which beam is doing all the work and which one is dead weight you can delete to save cash. Success feels earned: the same gap can be crossed with a plain truss or an overengineered monstrosity, and both count.

The campaign starts with light car bridges and works up to multi-deck drawbridges, jumps and levels with tight material restrictions. Later on, hydraulics let you build parts that move: pistons that lift, swing or fold sections of your bridge on cue, with a controller that decides which one fires and when. The difficulty climbs honestly, and the late worlds are genuinely hard, with budgets that leave no room for a safety margin. When the campaign is not enough, the Sandbox lets you build whatever you like, from serious engineering to absurd contraptions, and the Workshop holds hundreds of extra levels plus a place to publish your own as puzzles for others.