Contact

The game is made by one person, and the one address reaches him: info@mieruconsulting.ai. Most messages get a reply within a couple of days.

Worth writing about

A chart that felt unfair. Every chart is proved to have exactly one answer before it is published, but a note can still read ambiguously. Send the chart number and the note, and the wording gets looked at.
A bug. Say which device or browser, what you did, and what happened. A screenshot helps.
Your account. Sign-in trouble, a streak that looks wrong, or a purchase that did not arrive. Deleting an account is described on the account deletion page.
Press and partnerships. The name, the chart artwork and the share grid are free to reproduce in coverage of the game. See About for the plain facts.

The game is on the web at cartographerslie.com, on the App Store and on Google Play. The privacy policy and terms are their own pages.