The only real complaint I have is, it feels a little awkward to select and submit answers without using a mouse, since it's. Type name, press down (and sometimes up) to pick an answer (even if you wrote the name perfectly correct), press enter, press tab to go to guess, press enter.
And if you press tab at the wrong time, it loses focus on the game.
I feel like it should be possible to move to "guess" while you have a name on the list highlighted, without first clicking enter. Or to directly guess from there without moving to a button. That increases the risk of misclick, though.
I think I'd add something like:
left arrow moves focus to the text field, right arrow to move focus to the guess button.
If you press right while the list is showing, it automatically selects the currently highlighted result from the list, or the top result if you haven't selected one.
Also, in the City mode. Country isn't really that useful since it seems like there aren't many cities in the dataset per country. I wonder about mentioning country somewhere else, and having language as a thing you get info about instead. Might become more useful if you include more cities, though.