You seemed to enjoy crushing some castles a few months back. Now it appears they've been rebuilt and are awaiting your crushing skills once more.
If you missed out previously, the idea is simple: launch a trebuchet and try to knock down the castle walls so that all the inhabitants are crushed to death. You get various trebuchet upgrades as you go, including multi-balls, exploding shots, and extra large boulders.
There's a whole bunch of brand new levels here. It is insanely addictive.
Crush The Castle Players Pack [Kongregate]