Games

► Play The Cosmos — a space game built on measurement. Mars at its real size: 3,389.5 km radius, 3.72 m/s² gravity, a real oblate spheroid with real strata. Walk it, and jump — the same jump that clears half a metre on Earth carries you 1.3 m here, because the gravity is the actual number.

The ground is a 3D material field rather than a height map, so caves, tunnels and excavation are representable from the first build. Every asset carries a stable ID and every point on the planet has a latitude and longitude — turn on the dev layer in Settings to see the grid and the ID bubbles. On a phone, the movement stick appears under your thumb and disappears when you lift it.

► Play SYL — the permanent Three.js space game. The live V1 lets you repair a ship, launch, cross real space without a loading screen, and land on another world while the authority-first physical-universe rebuild proceeds in the open.

One responsive game for phones and desktop browsers; touch controls appear automatically. Canon and source are public in SYL-Full-Game.

► Play Fable Survival — a mobile-first survival prototype: scavenge, build, fight infected, survive the night, and see other Heartbeat players through the shared realtime presence layer.

Hosted inside Heartbeat Observatory so phone and browser playtests share the same public link and multiplayer shell.

► Play Parkworks Tycoon — a mobile-first park management game: build rides and food stalls, keep guests happy, set your prices, and clean up the litter before it drives everyone home.

Signed-in Heartbeat players get their park saved to their account, so it follows them from phone to desktop. Everyone else keeps it in the browser.

► Play Rustfall — a post-apocalyptic wasteland to survive: worker robots run salvage loops while hostile ones hunt you, shamblers converge on anything living, and a nine-metre Iron Warden stomps the scorch arena. Drive multi-seat vehicles, pilot a mech you can rebuild part by part, and snap a base together piece by piece.

Press L to flip the whole world into its inspection layer — the module grid, every asset’s id and bounding volume, and a live report of anything floating, buried or intersecting. The game and the thing that proves the game is honest, in one build.