Seems really familiar haha XD
Well, look at my version, maybe you find some inspiration;http://www.java-gaming.org/topics/space/27474/view.html
- When there are no stars or background in view, you dont have any sence of direction since its all black around you.
- Its easy to get lost, i would recomment some navigation.
*And yes lwjgl is really good for this, it allows you to extent your game easy if you would want to add things like 3d planets.
There are some higher level engines, but this way you will learn much more.