VERSION 1: http://www.2dplay.com/crazy-cube/crazy-cube-play.htm
VERSION 2: http://onemorelevel.com/game/3d_logic_2 (thanks swiggidy)
object is to link the same colors together on the cube vertically or horizontally. it gets tough when the paths start to cross over each other and you need to find the right pattern. you will probably think wtf this is ridiculously easy until you hit level 16, which i was stuck at for over 30 mins (hardest level imo). i became so addicted and determined to beat it that i played this for 2.5 hours straight tonight. yes it took me 2.5 hours, but i'm a fish.