A signal lens has vanished from the Midnight Observatory. Four night staff were present. Can you work through the evidence and decide what happened?

I’m looking for the first independent playtesters for The Midnight Observatory, an English printable mystery for 1–4 players (suggested age 12+). It has five evidence puzzles and a final case decision.

Free download: https://midnightcasefiles.itch.io/the-midnight-observatory

The ZIP contains a Player Pack and a separate Host Guide in both A4 and US Letter. You need paper and a pen/pencil; no cutting, physical locks or astronomy knowledge. A host is optional. Please keep the Host Guide closed until you want hints or the solution.

The puzzle logic and PDFs have been checked, but I don’t yet have independent human playtest results or a measured playing time. That is what I’d really like help with:

1. How many people played, and roughly how long did it take?

2. Which instruction or puzzle caused confusion? Were the printed pages readable? Please put solutions/spoilers behind the spoiler button.

3. How enjoyable was it from 1–5, and what one change would improve it most?

Even a quick report that you stopped partway through is useful—please say where and why. You can reply here or leave a comment on the game page.

Disclosure: AI assisted the writing, puzzle design and document production. This is a free community launch. Thanks for helping test whether the experience works for real players.