Grow mode 🌋 — Tap the planet to release heat and collect steam (☁). Spend steam on upgrades so it keeps cooling on its own. 1500°C → rain at 300°C → oceans at 100°C → a water planet.
Drop & merge ☄ — Drag to aim, release to drop. Two identical bodies merge into the next one up, from cosmic dust all the way to a water planet.
The fuse ⏱ — Hesitate and the fuse burns out: the piece explodes and blasts your stack apart. Keep everything inside the disk, or it spills and the run ends.
The loop — Your puzzle score converts into steam, which accelerates the growing planet, which earns star shards, which multiply everything.
Beyond ✦ — Clear stages to earn items, trade items for invitations, and unlock hidden disks where golden and rainbow bodies fall — and where planets evolve past the water world.