[wscourge]

Cool one, especially for kids. It'd go well with naming the capital city, too.

[Zecc]

You might like Worldle and Flagle too.

  https://worldle.teuteuf.fr/
  https://www.flagle.io/

[mkl]

Clickable: https://worldle.teuteuf.fr/, https://www.flagle.io/

These both seem to be one per day, so you can't sit there and do a whole bunch in a row.