Select Pangya Tour mode then choose License mode. Complete all the indicated challenges in each course to unlock the corresponding ring.

Ring	How to unlock
Accuracy Ring II	Complete the Sepia Wind challenges.
Accuracy Ring III	Complete the Wind Hill challenges.
Control Ring II	Complete the West Wiz challenges.
Control Ring III	Complete the Wiz Wiz challenges.
Curve Ring	Complete the Blue Lagoon challenges.
Expert Ring	Complete the White Wiz challenges.
Power Ring II	Complete the Blue Moon challenges.
Power Ring III	Complete the Deep Inferno challenges.
Spin Ring	Complete the Pink Wind challenges.