The games people play...

What's your favorite game for Kindle or similar device?

I tend to enjoy mindless pursuits, so I'm having a good time with Ultimate Jewel by Balloon Island.

I have tried Candy Crush, by King.com -- and like it -- but I don't like the time restrictions that pop up after failing to complete an assignment a few times.

Do you have any mindless -- and hopefully free -- suggestions for me?

TIA!