One tap drops the block. Land it clean and the tower climbs — out of the Stone Age, past the pyramids, through the Renaissance and the Industrial Revolution, up past the skyline and off the planet. Every era brings a new crane, a new material and a new world underneath you.
Cross into a new era and nothing cuts away. The same tower keeps climbing — the ground changes underneath it, the crane above it is rebuilt, and the block in your hand becomes a different material.
Real screens, in order of the climb.