Tectonic Rift

The ground is splitting open and the rift grows wider with every earthquake.
Your survey crew must ferry monitoring trucks across the chasm. Drag wooden
planks and steel beams into place, span the gap, and watch the live load
gauge as each truck rumbles over your bridge. Overload it and the whole span
comes crashing down.

A siren sounds seconds before every quake. When it hits, the far wall lurches
outward and short spans snap. Reinforce fast, keep the convoy moving, and
earn coins for every safe crossing. Salvage unused materials for bonus score,
then spend your haul in the Supply Depot on six field upgrades: obsidian
bridge plating, reinforced steel, an early quake warner, a rapid patch kit,
stabilizer struts and golden alloy bits.

Simple one-hand building, tense real-time load physics, and a canyon that
never stops growing. How many crossings can your expedition survive?