Play games
Choose the game that interests you and play itfor free.
Complete the quests
Every game has some quests for which you will receive Soul Gems.
Receive rewards
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
Just noticed this, it might be a problem on my end, but the text colour and colour of the experience bar are like the same and it's hard to see where I'm at. Nothing big, just an ease of life thing that I noticed and I swear it wasn't like this before.