Hi, cool game; I did a 1cc of this (video below - the video description has a bit of a review from a shmup player perspective too).
Separately from that, I had 2 questions:
Question 1: is there any way for me to know when or how to hit the par time on the 4th boss? Since there's no ending stats like with the previous 3 bosses, I would never be able to tell whether or not I got a perfect run (i.e. while I can see for myself when I have been hit or continued, I can't see if I met the par time requirements, since I don't know them).
To clarify, this is not about achieving it once - I have done so according to the achievements menu - it is about knowing if I have achieved it in any given run that I just completed. This is important for people trying to aim for a perfect run (or for a higher score for that matter), as it is kind of frustrating to have to just assume that one was fast enough or not.
Question 2: Is there any reward for a perfect run? Like an extra boss phase or differing ending text? The game's ending text reads a bit as if that were not the case, as it doesn't seem to be the point of the game. It's important in shmups though to give player incentive with some sort of goal they can reach for.