Hi again, Yuriy. Great job keeping this up. One thing to note: activities - that is, almost any thing a person can do - do not need an article. So: futsal, football, reading, philosophy, landscape gardening, men's 100m freestyle, keyhole-surgery and so on infinitely, generally do not use a/the.

[However, you would use the article the in the phrase "the game/sport(in general, as an idea) of futsal." And the article a in the phrase "a game(session/specific game) of futsal = a futsal game."]

Hello everyone!
Today I am continuing to write about my hobby, which is the futsal.
Why do I like the futsal more than the football?
The Futsal is more dynamic, you always have to move on the pitch [т.е. the futsal pitch: the particular pitch, which we play on], you play "with a/the ball". [<by this, do you mean that ball handling is more emphasised than in normal football?] 
Some time ago I was a player on (on a team - a slightly odd preposition) (or perhaps with) our city's team

if be exact: to be exact / to be precise,

we were[множ. с 'we'] friends which/who played together. We trained, we took part in competitions, a few times we took prize places.
This was a cool time.
A few months ago I had to move on in to another city. Now I don't have enough time to play but once (in) a week I try. I'm looking for a new team, but now I play in different places with different people. I hope I'll never give up football/futsal.

Today's story is short, but nevertheless, I tried to write my thoughts and describe my feelings in the way I can.

As usually: thank you if you read my short story and thank you once more if you find any mistakes and tell me about it them.
Have a nice day/night!