A1: After you release all the balls (including the small golden one), you will need to get back in this arena and try to dodge the big boulders and pick up the small golden ball. You must position yourself to throw the golden ball through one of the golden rings on either side wall of the arena (it does not matter which one). Once you do this you will see a cut scene of the small golden ball rolling into a contraption that stops the large boulders and opens an exit door for you to proceed. Hope this helps.