Ok....Got much of the refactoring done..(game used to be much more mission/campaign based)
Lots of mental load is off my shoulders.
The game is now a side-scrolling, space-shooter, endless-runner (non-shmup).
Essentially - get as far as you can with a single ship across the enemy landscape - eventually into the very core of their base to defeat them.
Collect salvage (exploded object fragments) as you go in order to unlock/purchase other weapons, abilities and general upgrades.
Please take a peak at the video below ....(sound is crap recorded from my monitor - having trouble with soundflower)