It's perfect now, Howard.
The brightness, I mean.
I tried it again, and I got the same error.
Maybe I can send an error report later.
But, I went over to a friend's computer (he uses linux) and he was able to run it.
It looks good, but the framerate is a little low. The scene with the ship entering the atmosphere needs a bit of work, the ship's effect to make it look like a fireball could be better.
The bullets just seemed to come out of nowhere...
Perhaps you should add a little scene of turrets popping out of the ground or something to that effect?