Stage 2:Bubble
As the name suggests, the stage is related to bubbles. The music is Aqua Illusion.
The stage is filled with bubbles that break into smaller pieces when shot. It doesn't start off too bad, but soon, GIGANTIC bubbles fill the screen, although its not hard to eliminate them.
Keep an eye on the enemies from the hatches, as they will release bullet barrages.
The boss is Bubble Eye.