How the lab works

Get a vehicle from one bank to the other without the deck snapping — and stay on budget.

1. Click an empty grid point to drop a joint. A ghost beam then follows your cursor to the next valid point -- click again to place it, or press Esc / right-click to cancel.
2. The dashed red rings on the cliff faces are anchor sockets — the only spots your bridge is allowed to attach to solid rock.
3. Pick Steel (strong, expensive) or Wood (weaker, cheap) before placing each beam. Every beam eats into your budget.
4. A long, unsupported beam is a lot weaker than a short one carrying the same material — bridging the whole gap in one piece looks cheap but won't hold much. Shorter, triangulated members carry far more load per point. Beams also can't be placed longer than 6 grid cells — the ghost beam automatically snaps back to that max range as you drag, so you can always see where the limit is. Cross a wide gap by chaining shorter beams through added joints.
5. Press TEST BRIDGE to turn on gravity. Beam color shifts from calm toward red as it takes on more load.
6. Press SPAWN VEHICLE to load the deck — pick a Sedan, School Bus, or Semi Truck first. Spawn a few in a row to really stress-test it.
7. A Semi's cab and trailer act as two separate weights a bumper apart — they can land on and stress two different beams at once.
8. A beam that takes on too much load snaps and disappears — that's the physics showing you where the design failed.
9. Back in Design mode, right-click a beam to remove it, or hit RESET to start clean.