Excellent concept!
I like this game. I also like the ability to build your own castles. I'm awaiting whatever next installment there will be to the Crush the Castle games! I like the simple destruction mixed with the strategy of trying to hit the castle just right.
In the next one, I would like to see more variety of projectiles, build materials, more gore and more randomly inserted player-created castles.
Very nice game you have created!