Hello,
I played two skins game and I win 9 skins in each game but I don't know where are those skins and how I can use it in my avatar.
Thank you
These are immaterial, only valid during that game. No further use or benefit applies.
When playing a skin challenge, there will be credits at stake and a skin won there will fill your credit account if you finish that game.
Thank very much for your answer Alosso ; )