Frustratingly waste

My review is from the Android app.
At first I was really excited about the game, even if lacking the variety in the long run and the missions always the same. But it has undergone between fun and it was - allegedly - even without the sale of gold or boats with real money quite good.
But then came the disappointment: I had enough gold zusammengesparrt to me to buy a ship more than 100,000 gold and looked ready at least for the next missions. However, to fight in the mission, in which one examines the death of his Priatenfreundes, against a slave fort. Here one should take the 14 defenses with the Drehbrasen.
However, it is with my standard ship probably just impossible because you'd have to take the 15 towers without a miss and without compromising performance, to avoid being destroyed. It has also - anderst than in the other struggles - no way to dodge and 1-2 misses can be at 14 goals hardly be avoided. Surely you can play this mission 100 times to perhaps someday to do with luck, but I was so frustrated after 20 attempts, that I have the dirt simply deleted from my smartphone.