Type 'easy' or 'hard' to begin the quiz. Easy is a 15-degree grid, hard is a 10-degree grid. Then, try to name the largest 50K+ cities in each square IN ORDER. To name a city, you must first click on the grid square to make it have a GREEN border. Then, type in the city answer for that square followed by a '.' (a period).
The squares will start with '0/5' (or maybe fewer cities if less exist in that square). Click on a square and enter the largest city in that square not yet answered (so, the largest city if you have yet to answer a city in that square). You will then have '1/5' and need to click on that square to name the 2nd largest city, and so on until you complete all the cities up to 5 (or less if less exist). If you name an incorrect city in a square it becomes 'locked' and turns red and you can no longer accumulate cities in that square.
You receive 1 point for the largest city in a square, 2 for the 2nd largest, and so on.
At the end of the quiz the largest remaining city you haven't named will be shown in each square.
Quiz Takers 
Intrigued by the alphabetization of answers 20 and 21. Is there a reason for that in some aspect of transliteration I don’t understand – or is your order stored separately from using the names to alphabetize? (Pretty sure you’re not using ISO 2 letter codes to alphabetize, because then the order is further out of whack – 11 is too soon, 14 is too late …)
No was just my mistake 🙂 Fixed now.
I’d argue #2 has black on it in the same way that the flags of Bhutan or Kiribati or Sri Lanka have black. The outline of the object isn’t the same colour as the background or the object itself like in the flags of Afghanistan or Oman or Uruguay.
Yeah I’ll remove Cambodia from the correct list.
Isn’t black just a shade of white?
so you’d say the flag of Jamaica is green, yellow, and white?