I have played around with the board sizing trying to be a bit more dynamic for screen size. Love the idea of being able to play on a popup without the clutter of the browser and removing navigation etc. Will push some changes this morning.
Account is needed for session management, ability to play against another person etc.
Password is needed as accounts with no passwords can be messed with by anyone.
Email address is needed for notifications and also to reduce bot impact.
I did initially create a complete anon game system however for the target audience (elderly) having an account means that I can do lots of seamless 'magic' so they stay on a single page for the whole game and don't have to have 'special' links.
I named the site... Talk with tiles.. I guess cards are kind of tiles, just really thin ones!