Were you expecting a feature that was missing?
Got an idea you think would make the game more better?
So glad you're enjoying the alpha so far. To reply directly to your points:
The discoloured asteroids are due to a shader error - we think this is fixed in newer builds. We'll be slowly adding more asteroid variants (colours, shapes, etc.) as we continue to develop the game .
Agree completely with your second point, but we've found that a lot of players less familiar with space/flight sims get "lost" inside the cockpit when granted total freedom to look around. We're still working on a solution to this that balances freedom of movement with the need to gently assist newcomers to the genre. Hopefully this is a little better in the newer builds, but please do let me know.
Needing to refuel multiple times within a system should no longer be a problem, as sub-warp speeds no longer deplete warp energy/health. We basically decided that dying by running out of fuel was a very boring way for a play-session to end, and the constant threat of finite fuel discouraged exploration within systems.
Some form of currency will absolutely be coming in the near future. The development cycle from 0.1 to 0.2 is focused primarily on the core mechanics and procedural generation. Once we've released v0.2a, there will be a greater focus on activities and interactions within the game space - including trading and greatly improved AI for NPC ships.
Thanks again for your feedback, and don't hesitate to let me know if you have any further questions/thoughts.