Empty folder to a playable game: island, roads, houses, cars, villagers, day and night, then the tilt, balloons and eras on a second pass.
Skyhold
The sky islands are falling. Houses arrive by balloon, one at a time, and you drop each one where it keeps the island level.
The island has a centre of mass
Every building has a weight, and the island leans toward the heavy side. Drag the slider to load the east side and watch the gauge.
How a run works
You do not choose what to build. The balloon brings the next piece, the card on the right shows the one after it, and a slow drop lands on a random edge.
Five islands, five keepers
Each chapter is a new island shape with one request. Stars buy perks. Chapter 1 unlocks steampunk, chapter 3 unlocks cyber, and chapter 5 opens Endless and a Daily island that is the same for everyone.
Build log
Each day Opus 5.5 gets the folder back and one new job. The numbers come from its run logs.
Rotate and zoom the camera, 12 buildings with their own weight, 11 quests, a harmony bonus for a level island, gusts of wind, buildings sliding off past 15°, autosave and sound.
From sandbox to arcade: pieces arrive by balloon, a hold slot, combos, a harmony streak, gusts, slides and flips, five chapters with a keeper each, perks, Endless, a Daily island and a share card.
Your ideas from the replies.