To willo2ty2: For the first one, you need some run-up and jump at the edge, and it's easy. For the second one, you need to make a frame-accurated jump by which you can "slide" onto the platform when the birdfish faces right to be shot, and then jump quickly to avoid the second bullet. That's extremely hard. For the third one, jump down to the platform and jump quickly to avoid the bullet. For the fourth one, I think it's impossible.
SA reimuA,but speed is even faster than PCB sakuya:)
All bosses beaten with the first 6 bosses passed without losing life.
The last 3 bosses are too luck based and almost impossible to beat without misses,so I gave up.