Along with what Marta said above, I would add three things

There is a second game mode called Survival which unlocks after you earn the first Talisman. You can play/replay it at any time after that.

The game is not a killer, but it isn't a walk in the park either once you reach the last 1/3 of the game.

The cut scenes are really quite beautiful, and at the end of each section of the game, they provide the back drop for a mini game.

I really like this chaining Match 3 game.

Azkend is an uncomplicated but fun game to play. The game play is not all that challenging but I still found it enjoyable. The music with the game is quite lovely and not annoying as some games I have played. I am not sure it is worth the $20 price tag but I am glad I have it on my computer to play when I am bored. The levels are pretty similar and the only challenge is that you get less time as the game goes on to complete each level. The power-ups are average in the game; some are effective in the game some not so much. The storyline of the game could be much more interesting as the ending leaves you 2 choices how to end the game, but after playing twice you realize it ends the same way regardless of what you choose.
Overall, I liked the game though it is not challenging but sometimes you just want something to play and not compete against.