It would be silly to think that Crimson could take down Angry Birds. For one, Crimson is only available as an iPad game on iOS. Angry Birds extends everywhere. Android, iOS, OSX, Chrome Browser, QNX-based Blackberry devices, Sprint Phones, WP7 etc. Angry Birds is too far integrated into everything to be so easily taken down. Crimson may be a good game but it wont be nearly as popular. It's got a pretty good chance at going relatively unnoticed.