Rudicubes has Cubz – 3D Sliding Puzzle (iTunes Link) in the iTunes App Store for FREE for a limited time.

Cubz is a 3D sliding puzzle game inspired by the famous sliding 15 Puzzle game. The game consists of 8, 17 or 26 cubes disposed in a matrix called Cubz. The goal is to reorder the cubes one by one as quickly as possible and with a minimum number of moves.