The Vanishing at Bellweather House
Investigate a locked-room disappearance: pick three clues, then decide what to tell the constable.
V2 · 0:13 demoPlay
Full screenV2 · 16 KB · one HTML file
Prompt
Build a short interactive mystery1 What it does with meaningful choices4 What must happen, three endings and a restart button4 What must happen.Exactly as it was typed.
- What it doesWhat it is, and how long.
- Who it’s forThis prompt leaves “who it’s for” to the AI.
- How it should feelThis prompt leaves “how it should feel” to the AI.
- What must happenChoices that change what happens. How it can finish, and a way to play again.
What this teaches
Ask for choices that matter and a number of endings, and the story keeps track of what you did.
- "meaningful choices" makes the clues you gather decide how it ends.
- "three endings and a restart button" asks for ways to finish and a way to play again; here the three final choices lead to four endings.
- The change adds a way back to the last choice, so a player can try another ending without starting over.
Changes
Let players revisit the last choice before starting over.Change request · V1 → V2
What changed
- After an ending, Revisit the last choice takes you back to the final decision with your clues kept.
- From there you can pick another ending.
What stayed: The investigation, the clues and the endings are the same as before.
Try a change
Each one starts your own draft in the Studio. Nothing is built until you press Build.
How it was made
- V1 Built on Oct 14, 2026 · Direct · Verified on the first try · 160 s · Tested on desktop and phone · 1 AI Credit
- V2 Changed on Oct 14, 2026 · Verified on the first try · 281 s · Tested on desktop and phone · one change, no AI Credits
Known limitations
- There is one mystery, and each playthrough has four steps.
- It has four endings, not the three asked for: presenting the evidence ends one of two ways, depending on the clues you found.
- At the final decision, the heading still shows the last clue you looked at.
- Starting the investigation does not move keyboard focus into the story; press Tab to reach the choices.
- Nothing is saved: closing the page starts the story again.