In order to add funds to your MoneyBowl wallet you must first enter your initial free $5 Money Play challenge and bowl a complete game.
Once you have bowled your first game using the app your wallet will be unlocked and you should be prompted with a wallet tutorial.
You can now click Add Funds and Link a credit card to your account. Once your credit card has been successfully linked you will be able to add up to $200 dollars a day to your wallet.