If you haven't checked out the daily, it's a little game called Ice Princess. On the surface, it appears to be for kids, and middle to older ones would enjoy this, but it has a lot to offer adult puzzle fans.
Since I was low on puzzlers I haven't played over and over, I gave it a go. Basically, you have to move a two square object (the prince in an ice block) around tricky courses to achieve your goal (rescue the princes, what else?)
There's a bit of humor and a thin story, but the levels are just plain fun! A lot of entertainment for puzzle fans for $2.99.