A Ferris wheel or big wheel is likely to be about being caught on a karmic cycle. This is where you miss the opportunities in life to repay the karmic debts you owe. This can results in the need to plan another life to pay the debts you had planned to pay this time around. A Ferris wheel ride symbolizes this perfectly as it just does a complete cycle and you end up back where you started.
Wheels represent your heart due to their circular shape. Here circular is a pun on circulation system where the wheel’s circular movement symbolizes your blood circulating around your body.