Thank you for playing and commenting. So much more to do, there was so little time to get things done, so this was a bare bones effort to get it working, and far from my satisfaction. High on my list is to change the radar type to one that scans the entire area rather than a small forward area. In future there will also be a need to shoot down enough turrets before finding pieces, and I will make it clearer what you need to find. There will be a countdown timer and multiple levels, as well as a just free roam shoot the enemies. Hopefully I can get some enemy ships shooting back. Cheers.
p.s. I might have left in a cheat key, press Z to initiate the central tall building to fall away, uncover the portal and enable it, then you can fly through and finish the level.