Five demos written by Claude Sonnet 5.5

Every page here was written in one prompt, one shot by Claude Sonnet 5.5, Anthropic's mid-size model, released on September 28, 2026. Two tiny fixes by hand, listed at the bottom. Open them and try them yourself.

Last Light

A round-based zombie survival shooter in a haunted farmhouse: boarded windows, wall weapons, a mystery crate, perk machines and an upgrade forge.

WASD · mouse · clickF rebuild / buyG = god mode11.1 min · $0.93Play

AURORA X9

A launch page for a graphics card that doesn't exist: a 3D card built in code on a reflective floor, fans that speed up as you scroll, a ray tracing slider.

ScrollDrag the slider14.4 min · $1.23Open

Orbit One

A 360° smartwatch viewer: a live watch face, five hotspots that fly the camera in, five finishes, three faces and an exploded view.

Drag to spinClick the dots11.1 min · $0.92Open

New York Skyline

The 2,000-line test: Manhattan's skyline over the harbour with boats, reflections, a helicopter and walking people, from dawn to night.

Time-of-day sliderWeather15.8 min · $1.48Open

Cindermere

A voxel sandbox with caves, ores, torches, mobs, a day/night cycle and water you can scoop up with a bucket and pour somewhere else.

WASD · mouseLeft break · right place1-9 hotbar12.8 min · $1.08Play