Firstly I have Devil Invasion. Its free for a limited time only. There is a lite version also.

Bascailly it one of those match 3, like bejeweled but it is set in a hexagon board, with rpg elements (much like puzzle quest) where destroying gems of a color gives you power stones of that color, and you can cast spells with your power stones. You level up, earn gold and buy new skills.

The gameplay has a slight element of tower defence, where monsters walk towards your castle and you need to defeat them with spells or matching attack stones. The match-3 does not need to pause, like the old bejeweled, you can match some stones then still match other stones on the other side of the board.

Overall its quite a fun game, with open feint as well. Free for a limited time, I recommend getting it if you like puzzle quest.