I don*t get it. Even with 5 cannons and a level 2 Balloon I'm still not strong enough to kill a very basic enemy? Well, at least i thought it was a basic enemy. Since they don't have any healthbar or any other information about there armor or level or something else ... i guess you get the point, right?
I can fly around, fight and die. That's all i discovered in the first 15 minutes. Maybe start your game with a walkthrough?
Oh, and one last thing: after dying and return to the next city instead of repairing the ship, you should make sure to enter a city where the ship can be repaired. Right now I'm simply stuck and can't leave the city. "Not enough components on the ship".