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The whole build is a pure function of one progress value, so you can scrub the timeline in both directions. Drag to orbit, wheel / pinch to zoom, right-drag / two fingers to pan.
| Space | Autopilot play / pause |
| ← → | Previous / next construction phase |
| [ ] | Slower / faster (0.5× – 4×) |
| 1…6 | Camera: overview, deck level, pylon top, waterline, helicopter orbit, free |
| W | Weather: calm / windy sea |
| T | Toggle automatic time of day |
| B S M | Bloom, shadows, sound |
| H / ? | This help |
Sag slider exaggerates the cantilever droop (real value is shown in the HUD). Each segment droops under its own weight and that of the lifting gantry; every stay that is tensioned carries part of the load and the droop shrinks.