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■ Hold a Universe in Your Hands Planet Destruction Simulator: Space Sandbox is a cosmic sandbox that puts the entire life of a star into your fingertips. Starting from a single gravity well in the void, you hurl meteors, forge worlds, and watch them die — from the first speck of dust to the final black hole. Play god, and witness a cosmic cycle from beginning to end. ■ The Cosmic Cycle At the center of the screen sits a gravity well. Throw meteors into it, and stars begin to form. Your creation evolves stage by stage until it ignites, explodes as a supernova, collapses into a black hole, and eventually fades to nothing — ready for the next cycle. Stages: - Deep Void — empty space - Protostar — dust and gas gather into a purple proto-body - Young Planet — a magma world crackling with lava veins - Ocean World — ice meteors bring water, and it turns blue - Living World — iron meteors spark life, green spreads - Moonrise — satellites begin to orbit - Late Bombardment — a rain of meteors scars the world - Stellar Ignition — it burns like a sun - Supernova — a spectacular explosion - Black Hole — the event horizon devours everything - Heat Death — the universe returns to silence ■ Four Meteor Types - Gas Meteor — basic fuel that builds mass - Burning Meteor — high-energy accelerant that hastens ignition - Ice Meteor — creates water and oceans; also cools a star - Iron Meteor — sparks life, and rushes stellar collapse ■ Your Meteor Diet Shapes Destiny — 11 Planet Types The ratio of meteors you throw determines what kind of world is born. Discover all 11 celestial bodies. Single-dominance worlds: - Earth-like — the natural outcome of a balanced diet - Cloud World — gas-heavy, a Venusian shroud - Frozen World — ice-heavy, a Europa-like ice shell - Dark Cratered World — iron-heavy, charcoal-black and pockmarked - Red Barren World — burn-heavy, a Mars-like wasteland Pair-combination worlds: - Jupiter (gas + burn) — a banded gas giant with the Great Red Spot - Saturn (gas + ice) — a golden giant with tilted rings - Neptune (ice + iron) — deep blue with the Great Dark Spot - Airless Moon (gas + iron) — cratered gray satellite - Mars (burn + iron) — canyons and craters on red rock - Martian Asteroid (burn + ice) — a potato-shaped wanderer ■ Spectacular Stellar Reactions Once your world ignites into a star, each meteor triggers a dramatic effect radiating in every direction. - Burning Meteor → Fireworks erupt across the sky - Ice Meteor → Steam vents billow from the surface - Iron Meteor → Lightning bolts spark outward - Gas Meteor → Solar prominences arc back to the star ■ The Black Hole Sandbox After the collapse, the black hole phase becomes an observational sandbox. Feed it meteors to keep marveling. - Gas Meteor → Aurora curtains deploy in a radial corona around the horizon - Burning Meteor → Galactic Nucleus Transient — the accretion disk flares white-hot as cyan relativistic jets erupt - Ice Meteor → A blizzard of tiny stars sweeps across the sky - Iron Meteor → A dark miasma spreads slowly, swallowing the starlight ■ Album of 12 Celestial Bodies Every world you create is permanently saved to your Album. Tap an icon to see it enlarged with its discovery date. Complete all 12 entries — 10 planets plus the sun and the black hole. ■ Chase High Scores Your score reflects both cycle completion time and the rarity of the world you forged. Rare bodies like Saturn (+1200) or Neptune (+1000) yield huge bonuses. Your top-10 rankings are stored locally forever. ■ Features - Fully optimized for smartphone portrait screens - True 3D rendering with WebGL (Three.js) - Ambient BGM and SFX generated with Web Audio API - Works completely offline - English / Japanese language toggle - No ads, no in-app purchases - All data stored locally - Simple tap-only controls ■ Perfect For - Astronomy and space enthusiasts - Sandbox game lovers - Anyone drawn to beautiful visual effects - Players seeking a short, satisfying session