Bridge Builder Tycoon

Design. Construct. Test. Survive. A physics‑based bridge building simulation where you connect two cliffs, manage a budget, and guide a vehicle safely across. Every beam matters – choose materials wisely, create a continuous road path, and watch your structure handle the load.

🎮 Gameplay

Build a bridge from the left anchor to the right anchor using a grid of node points. Connect nodes with different materials, then test your creation with a moving vehicle. If the bridge holds, you earn a bonus and advance to the next, more challenging canyon.

But beware – overstressed beams will snap, and a broken road segment means a spectacular (and costly) failure.

🛠️ How to Play

1. Select a material – Wood (10),Iron(10),Iron(25), or Road ($15).
2. Click two nodes to build a beam between them.
3. Road segments are mandatory – You must form a continuous path of Road beams from the left golden anchor to the right one.
4. Click TEST BRIDGE – The vehicle will drive along your road path, applying weight and dynamic forces.
5. Watch stress indicators – Beams glow yellow → red as strain increases.
6. Eraser tool – Click any beam to remove it (refund included).

Goal per level: Keep the bridge intact so the vehicle reaches the far side. Bonus: +$100 for a successful crossing.

📐 Materials & Mechanics

Material	Cost	Strength	Stiffness	Best use
🪵 Wood	$10	Low (700)	Medium	Budget builds, light spans
⛓️ Iron	$25	High (2200)	High	Heavy loads, long gaps
🛣️ Road	$15	Medium (1200)	Medium	Required for vehicle path

• Verlet physics engine – Nodes move, bend, and transfer forces realistically.
• Beam breakage – Calculated from tensile/compressive stress.
• Vehicle mass increases with each level (12 → 20 → 30).
• Gravity pulls down the vehicle and distributes load across connected road nodes.

🏔️ Levels

Level	Gap Start	Gap End	Budget	Vehicle Mass
1: Easy Crossing	X:200	X:500	$500	12
2: Wide Canyon	X:150	X:650	$800	20
3: The Great Divide	X:100	X:700	$1100	30

Advance by completing a level, or Reset Level to try a different design.

🖱️ Controls

Action	Input
Select building material	Click Wood / Iron / Road button
Delete a beam	Click Eraser, then click the beam
Place beam	Click first node → click second node
Start test	Click TEST BRIDGE
Restart level	Click Reset Level
Next level	Click Next Level (appears after success)

All interactive hotspots are highlighted – no keyboard needed.

✨ Features

• ⚛️ Real‑time physics simulation – Nodes, constraints, stress, and breakage.
• 🎨 Visual stress feedback – Beams glow orange/red under high load.
• 🔁 Undo/erase – Remove any beam and get a full refund.
• 🧠 Strategic depth – Balance cost vs. strength, plan node placement, and ensure a connected road path.
• 📈 Level progression – Three increasingly difficult canyons.
• 💾 Instant reset – Restart a level with full budget.

🔧 Technical Notes

• Pure HTML5 / JavaScript – runs in any modern desktop browser.
• Canvas‑based rendering with dynamic collisions and constraints.
• Optimised for mouse input (crosshair cursor, click‑to‑connect).

Think like an engineer, build like a tycoon, and don’t let the bridge fall. Ready to span the gap?