Thank you very much!

@Superku:
Some time ago I already wanted to implement DoF but I thought it wouldn't look good. However, I saw it
some weeks ago being used in a side-scrolling game and I'm glad that I've changed my opinion.
It doesn't look bad and might even help you to focus more on the important part: your ship and the
enemies... so it doesn't really distract you like in a lot of first person games which use DoF (like you've said).

The ring around the ship is actually animated but still very simple, yes (maybe we'll make something more detailed in the future).
About the gui: This is even older than that 'ring'
(...as you can see in this ancient screenshot)

I'm sure it's going to change, but thanks for pointing that out