Quite enjoyable
This was a fairly good game.
The graphics were pretty nice, except the castle could´ve looked a bit better. But on the other hand it must be hard to make a castle look realistic when it gets destroyed, so I guess it was okay to make it as simple as you did here. The sounds were also nice, but I really missed some background music here. Some good music can make it a lot more interesting you know, the silence gets boring after a while.
Another problem I had with this game is that it starts to lag easily. The game itself started to lag a bit at times, which was still okay. But as soon as there was anything else moving on my screen, such as an animated add, it started to lag a lot. This especially became annoying when I was about to swing another ball to their castle. Happened to me pretty often that I thought the game didn´t respond and pressed it again and my ball was dropped. Or that the catapult was already swinging back so that I also had to drop my ball.
Overall 7 out of 10, 3 out of 5. The game was quite enjoyable and I did kill some time with it. Nice that it also had a high score list by the way, gave it some more replay value. Anyways, try to improve on the stuff I mentioned above and keep up the good work.
~Auz