1. Created a blueprint for procedural asteroids/power cubes location.
I used InstancedStaticMesh component to render asteroids and power cubes in large quantities (~3000-4000). 
Asteroids and Power Cubes are now represented as cube meshes. For every N-th asteroid one power cube is added created. 

Asteroids are rotating around its local center point or, when set HardMode boolean, also around space station position. 

2. I modified flying blueprint to not reverse ship roll.

3. Created space skybox blueprint. Textures from Spacescape app. (http://alexcpeterson.com/spacescape/)