Sector has been updated to version 1.6, which is basically a bug-fix of 1.5.
Since 1.5 it is marked as Beta, and the only remaining thing to be added is the campaign mode.
+ added online highscores and shared levels (downloaded from server)
+ added update notifications
+ added login system for the online highscores
+ now supports user-created levels
+ added ship saving and loading.
+ many new GUIs and GUI improvements
+ new menu theme
+ fixed collision detection system bugs
+ added flamethrower
+ added "fire" effect with DoT?