I don't have a problem with the front. The spine is ok, just missing the appropriate logos. As for the back, this needs some life. The background image is ok, just need more imagery (screen captures maybe). Maybe have each title with an appropriate screencap and mini synopsis next to it. Experiment some more.
One more thing, I need you to post a flat preview on all WIP's (visa the rules). That would make me, Irrob, aka Rob, the WIP moderator very happy.