Aqua Jewel by Cybergate Technology Ltd.

This is a puzzle game where you link three jewels to make them disappear within the time limit.

AquaJewel provides two modes for you; the Classic Mode where you can
level up gradually or the Quest Mode where you have to change all the
panel background to complete a level!

Developer Website: http://itunes.apple.com/us/app/aqua-jewel/id522581015?mt=8