Perfect interpretation of the theme!
But I still suggest making a few improvements:
1. Make the white not so bright (black is already as it should be).
2. Make the black spots geometrically irregular. (A long time ago, I saw such a concept in some review. And there, instead of circles, there were blots with splashes. And it really allowed me to navigate in space better.).
3. Disable the ghost collider just before the explosion. Because when you see the enemy, shoot at the enemy, hit the enemy, and the result is zero, it's a little frustrating...
P.S. Special respect for the Godot logo!