I kind of wonder how that guy who made Crush The Castle feels about the success of Angry Birds. Provided my timeframe isn't off, CtC was out and got a lot of play and downloads (on the iPhone) a good year and a half before angry birds even showed up.<p>The only MAJOR difference was the primary game mechanic; the projectile. CtC used a two tap mechanism where you launched balls from a trebuchet, it was all about timing. One tap to drop the weight, a second tap to release the ball. Progress through the game, you get three balls (yellow birds). Progress further, get bombs (black birds).<p>Suddenly, this Angry Birds game comes out, and the most noticeable difference is that it's cuter, and uses a slingshot instead of a trebuchet. A quick google search of the two brings up "Crush the Castle, Angry Birds set in midevil times".