ADDED:

+ Sign object (for fences)
+ Textures: Danger Sign and Alt. Route Sign

CHANGED:
> Scaffold structure for new puzzle arrangement
> Placed a row of fences at the front of the scaffold
> Disabled several scaffolds on the East side of the scaffold area (near the sand slope)
> Placed a mine cart near the fences. Mine cart has movable tag, rigid body and several box colliders.

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