入画 · WITHIN
Explore 18 painting and landscape worlds through chapter tours, free roaming and walking, with driving in Roadster and boat rides in Sakura Valley.
Assemble a ship from modular parts in this building game, inspect its connected systems and fly ring stunts, jumps or an isometric shooting mode.

Details
The work description and facts above come from the upstream README. Any Astra Games guides are listed separately, with their own sources and verification notes.
Platform
Browser; keyboard and on-screen flight controls. Free, no account or imported assets required to use the starter ship.
GPT-6 Astra
X — The creator credits Astra and Three.js for the ship-building and flight-game project. Verification notes.
Explore 18 painting and landscape worlds through chapter tours, free roaming and walking, with driving in Roadster and boat rides in Sakura Valley.
Six browser games in one arcade, including mountain rally, snowboarding and antigravity racing; counted as one collection.
An unofficial multiplayer Chao Garden fan game: choose a Sonic character, explore the garden and interact with Chao.