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.
How do I receive rewards on my phone? I didn't see any subpage or something that I can confirm on it/view tasks on the game's page. Please help me.