As you review, comment and share your colleagues' work displayed in the Gallery, you accrue good karma. The more work you review, the faster your lotus flower karma meter fills up. Once the meter is full, you are awarded a spin on the Wheel of Karma.
To spin the wheel, click the gold button in the center. You must first line up 3 of the matching icons in order to win.
There are different types of prizes that can be won, which are represented by the various icons.