It's hard on EASY MODE.
THE THIRD STAGE FINAL BOSSES NEVER EEEEEEEEND
They have so many phases.
Plus, you barely get any bombs. (I dunno how you get them, you just do)
And you have to tap the fire button, you can't hold it down or you'll use the freeze thing, which freezes danmaku for a limited time and gives you points so you can power up.
(Everytime you use it, it goes back to 0%, and 30% only lasts half a second)
It takes so long to level up, the highest I've gotten was 14.
I think you have 5 retries on Easy mode and 2 lives on each.
That's about the summary of the difficulty, I'm not good at phrasing things or things like that, so just try it out yourself and post how good you're doing.