Browser-native graphics & physics demos — C# (OnlyCSharp 1.8) compiled to WebAssembly,
everything runs client-side. No install, WebGL2 required. Each thumbnail is a real screenshot from the live deployment.
Play latest opens the newest build; every past version stays playable at its own URL, with an
evidence & proof gallery per game.

Cosmos — Solar-System Orrery
54,904 real objects — planets, the 88 constellations, deep-sky objects — each linking to its source. Drag to orbit, scroll to zoom from the Sun to the Milky Way, scrub time.
▶ Launch
PHYSICA
A walkable hilltop above the ocean; fountain a pile of colored rigid-bodies and watch them settle. Full-fidelity physics with a render-quality ladder and a live FPS HUD.
▶ Play latest (v4.0)📸 evidence & proof
SolarWorld — Real Sun & Sky
Walk a 3D world under the real Seattle sky for a chosen instant: the Sun is the actual directional light, stars and Moon at true positions. Free-look camera; Seattle weather drifts through.
▶ Play latest (v2.5)📸 evidence & proof
PhysicsOdyssey
Campfire hilltop at dusk with a real computed sky — accurate Sun altitude, Moon phase and stars — animated fire, walkable biomes and (4.0) true-3D CPU-rendered terrain. Warp the clock day to night.
▶ Play latest (v4.0)📸 evidence & proof
Solar Sky WalkSolar Sky Walk
A campfire-hilltop scene with a live date / Sun / Moon status line — the real-sky renderer, AOT-compiled. The 4.x line adds sun shadows, water reflection, a glass orb, real planets & constellation figures.
▶ Play latest (v4.7)📸 evidence & proof
OnlyCSharp 1.8 · GFX Showcase
Five live graphics showcases of the OnlyCSharp weather/data work — a Zambretti "will it rain?" barometer (driven by a live NOAA/NWS public-domain feed), a psychrometric chart, a wind rose, a climograph, and a pixel-art forge; pure OnlyCSharp 1.8 CPU graphics in Blazor WASM.
▶ Play latest (v1.0)
Weather Scales
Simulate weather at five scales — global insolation & seasons, synoptic pressure & wind, a local day with a live forecast, coastal tides, and the computable climate — all powered by OnlyCSharp 1.8.
▶ Play latest (v1.1)📸 evidence & proof| Game | Live | All versions (each playable at its own URL) |
|---|---|---|
| Cosmos | live | root app (single build) |
| PHYSICA | 4.0 | 1.0 · 2.0 · 3.0 · 3.1 · 3.2 · 3.3 · 3.4 · 4.0 |
| SolarWorld | 2.5 | 1.0 · 2.0 · 2.1 · 2.2 · 2.3 · 2.4 · 2.5 |
| PhysicsOdyssey | 4.0 | 1.0 · 2.0 · 3.0 · 3.1 · 3.2 · 4.0 |
| Solar Sky Walk | 4.7 | 1.0 · 2.0 · 3.0 · 3.2 · 3.3 · 4.0 · 4.1 · 4.2 · 4.3 · 4.4 · 4.5 · 4.6 · 4.7 |
| OnlyCSharp 1.8 | 1.0 | 1.0 |
| Weather Scales | 1.1 | 1.0 · 1.1 |