Because I've enjoyed the treasure-type games, I found Treasure Madness by zSlide through some of my Facebook game-playing friends.It's also very fun to play but I REALLY like the mini-games that you're offered before accepting treasures. They're not too taxing but they do get more challenging as you progress.
It's also going through changes and iterations so it will be interesting to see how it evolves with time.
I'm not affiliated in any way with zSlide

I'm not typically a gaming person, but Zynga's new Treasure Isle game is tons of fun. You actually go on a treasure hunt and dig and search to find buried treasure.
