Cool game! For US cities add the State abbreviation as well in the question because city names are not unique across USA. For example there is a city called Lexington in Kentucky, Massachusetts, Alabama, Georgia, Illinois, Indiana, Kansas, Maine, Michigan, Minnesota, Mississippi, Missouri, Nebraska, North Carolina, Ohio, Oklahoma, Oregon, South Carolina, Tennessee, Texas, Virginia, and Washington.
If you restrict the allowed countries to United States only, or play US Mode then the state is offered as a hint. However, if in other game modes the city name includes the state name then you automatically know it’s in the US which doesn’t seem balanced. And you’re right about repeated city names but they are often massively different in population, and you can get that for only a 2 second penalty.
Neat idea, but I found easy mode trivial and medium mode completely impossible (had never heard of most). I think it needs better hints, or warmer-colder info or something. I think it would be more fun if it was a way to learn as much as a test of what you already know.
You should get a toast notification in the bottom right saying how many miles away your guess is from the correct location. I know there's no instructions, I'll add those soon, but also let me know if the guesses weren't telling you the distance correctly.
Oh, I never saw the toast as you have to knowingly submit a totally wrong guess to get it. Most people won't know how far distances in miles are (vs. km), but I guess it's just a number that goes up or down.
Good job! Is the layer with the cities names supposed to appear too? I would have a lot more fun having only countries names appear on the globe and trying to guess the location of the city within.