The best and mind freshening game to play in your meantime.
Guess the country names by watching their flags. It will definitely be going to raise your IQ And your knowledge about the countries in the world.

*play in your free time
*easy to play
*All major countries included
*fun to play
*refresh your mind
*raise your IQ about country flags

also, ask your friends for their bits of help in case you failed at any level
let them join this game also.