Go to the "Games" page, select a game you like and tap the Install button. You'll be redirected to the AppStore. Install the game and play it for at least 2-5 minutes. You'll receive a notification from MISTPLAY as soon as you've played long enough - but for some games it may take up to 24 hours.
When you receive the notification, go back to the MISTPLAY app and provide your opinion on the game by answering 5 quick questions about your experience. Be honest since your feedback will help shape the future of the game! You'll instantly receive all your units once you send your feedback.