A good idea and one of the prettiest design at HP on the possitive side. The execution of the idea is not very good imo; there are too many ways to solve it that aren't (presumably) intendet. All in all I can give a 4/5.
NOOO!!! I got 134 points too but then i saw that there was the play button right to the thumbnail and not the restart button, and then i realised anything happend what should not happen, and so my score is not saved!
You'r guys can see the Two dots at the begining in the first castle? The one to left brings the Flag Down. The one to right only works when you have used the one to left. The one to right Brings the Flag Upside again.
[Edit] You can also Capture the Flag in the other Castle with the Bombs.