PuzzleJanken: free puzzle app for iphone, ipad

PuzzleJanken is really Rock, Paper, Scissors. Notice the Peace sign? That's scissors. You get the idea.

You are given a grid of symbols and must eliminate all the figures. Note: if 2 rocks are next to each other, they may cancel each other.  Except for the end. If the end target is a hand - paper - then it cannot be canceled with another hand.

PuzzleJanken has 60 levels. I've solved all 60 of them. It's and fun and mildly challenging.

The price is free, so definitely try it.