I still can't believe they had the balls to make it $20 on the 360 and $6 on the app store. Specially the app store. On 360 I'd say it's worth $15 and on the app store it should be $4 TOPS. If you've played the mobile version you know what I mean.
It would make sense beacase of playstation move. Not that its the only way to play, but it would be the best way imo.