For all platforms except mobile apps (#159) Please, implement a feature that displays a message, if user has:

• Device oriented (mobile devices) or
• Main app windows resized (desktop apps)

to portrait orientation (window width smaller than window height). In this situation or scenario, users must see an error message (full-screen overlay) and must be blocked from continuing gameplay or interacting with the app.

Details:

• Description: Game's Startup-Sequence → Device Orientation
• Code: HTML + CSS + Javascript
• Prototype: on-line or zipped
• Translations: in Wiki

⚠️ Please, note that this functionality must be implemented CROSS-SYSTEM. User cannot continue game play and cannot interact with application (website) if turns they device or resizes window to portrait orientation, no matter in which part of the game or application they currently are (main screen, menu, config, action, mine or cave, anything, anywhere...). ⚠️