My drawing is all glitchy (it seems due to order of things in the plantuml source).

Question

Try rendering this: http://vpaste.net/WZ5mb

You'll see the a2.views package doesn't contain it's children. How do you fix that??

 

Answer 1

This is because your classes are sometimes defined several times.
For example, MapView class is defined in package "a2" and in package "a2.views".
If you remove the declaration in package "a2", MapView class will appear in the right package

Here your (simplified) example :
@startuml
'skinparam classAttributeIconSize 0
skinparam defaultFontName Droid Sans Mono
skinparam defaultFontSize 14
'scale 1550 width

package "a2" #dedede {
    class Starter
    Starter *- "  1" Game
    class Game
    Game *-- "  1" GameWorld
    class GameWorld
    class Location
    'Remove the two following lines
    'class ScoreView
    'class MapView
    package a2.interfaces {
        interface IObservable
        interface IObserver
        interface ISteerable
    }
    package a2.views {
        class MapView extends IObserver
        class ScoreView extends IObserver
    }
    package "a2.gameObject" #d2d2d2 {
        ISteerable <|.. Vehicle
        Location "1  " --* GameObject
        GameWorld *-- "     2..*" GameObject
        abstract class GameObject
    }

}
@enduml