GridSpace - Transparency Fix and Galaxy

Hey. So here's the next update for my BGE game, GridSpace. So far, I've managed to fix the transparency fighting problem by pushing the transparent planes to a background scene.
It works well, but it took a bit more work than I'd have liked. Unfortunately, modifying the landscape will be a bit more difficult (making drops, for example, would require that I change the invisible floor in the game scene, as well as modify the floor in the background scene).

I've also added something that might be a bit excessive...

As you can see, I added a galactical swirl-type of effect in the background. It's a bit bright, but it conveys a nice effect, I think. Anyway, that's about it.