Originally Posted by Caleb Goessling
I can tell you from the replay I watched that the phases of the final boss are not timed. You have to destroy either a ring or one of the roaming ships to move on, and those things take forever to kill. Each phase of the final fight is on a spiral-shaped course, and if you don't move on by the time you hit the end of the spiral, your character will just sit right there at that spot until you do.
Did you know the "true" ending comes from shooting down 100% in Area 5? I seen it on the YouTube.
I must have been chipping away at the boss rings without realising then as i was shooting down all the small ships that fly out.