The start location for player levels is now different for each level to give some variety with the background. Note the terrain rises up to meet the player base/tower and this can create some initial level perfomance drops, will work on a better way to fix this.
Also with the background, have added 2 'base' ships that fly slow at higher altitude. They will probably be utilized further(launching missiles,fighters,etc or able to hit/destroy them) with later development.
A few other small bug fixes.
Feedback welcome,
Thanks!