The Quiet Hours

Build a cozy narrative mystery for the browser inspired by "The Quiet Hours" (shown in-game as "The Things Mimi Brought Home"): you play a small cat in a sleeping apartment building.
Premise: the cat's job is to bring small things home (a pen, a sock, something that rolled under the bed), and each gift helps her blocked writer finish her novel. But a missing-person flyer appears downstairs, and the cat starts noticing that a charming neighbour is not what he seems.
Tech: Three.js for a small low-poly building (or 2D if you prefer). Single page, click/tap to move and interact, works on phone.
Mechanics: explore rooms and hallways, pick up and carry one object at a time, use smell as a hint system (things you can sniff glow or leave trails), and deliver objects to unlock story beats.
Story: write it as a simple data file (scenes + triggers) so the mystery unfolds as items are found. Keep the tone cozy on the surface and quietly tense underneath; no gore.
Steps: 1) walkable building + cat, 2) carry/deliver items, 3) story triggers and dialogue, 4) the reveal and ending, 5) your own twist.
Make it your own: don't copy the original's name, art, text or code.