Hey guys I have a one more question - how to know what kind of player am I?

I mean is my name is still green, or which letter stands near my name s or n.

the letters are different for each person viewing you

and 's' means the person you are looking at has more than 5x your points, an 'n' means the person you are looking at has less than your points divided by 5

if the person you are looking at has neither an 's' or an 'n' then it means they are within x5 or /5 of your points

the strength letters wont apply for inactive players, who all have either 'i' or 'iI' by there names depending on how long they have been inactive

You will always be white to yourself.

Wonderful! Thank you guys for the explanations! tis really helpful!