Brain melting games are always fun to try out. Take Zentomino HD for instance. Based on Pentomino, Little White Bear Studios brings in this ancient puzzle game straight to your shiny iPad & iPhone screens. Zentomino lets you "achieve zen" by positioning puzzle pieces onto a given shape in the middle of the screen. However, you have to make sure that none of the puzzles overlap or go beyond the designated areas. The game is quite simple and perfect if you want to get away from all those action packed shooter games you've been playing for awhile.