Download a game that has been integrated with Foosler. Play it to your heart's content! Fall in love. If you want, you can enter a cash tournament based on the game - you were actually practicing this whole time.
To win cash, you pay an entry fee, play a typical level of the game and your score will determine the cash prize you receive. Finish in the top 3rd and you will win cash.
In short, make money playing the games you love.