Hi and thankyou for commenting.
The pieces which don't move are relics of attempting randomisation of placement of the pieces, which I ran of of time to finish, and also to clean up lol. Also my 2d radar kind of sucks, it so short distance and forward detection , and at the speed the ship is travelling it is of no use. I'm in the midst of implementing a 3d version, and whole of map detection, but now concerned finding pieces will be too easy. I'll try balance that with more enemies. Regards.