Late to the party (very) but commenting none the less. If the project is not dead and you wish to continue it, you'll have to listen to some of those comments because the difficulty is still stupidly high. Although I never ran out of purple orbs during the boss, it doesn't make it anymore doable fro a few reason:
1- She spends her time throwing an insane amount of crap and I lost my character in them more than once. If I had wanted to play touhou, I wouldn't be here.
2- Said amount of crap makes it that they aren't any pauses or window for the player to attack. And even if you can technicly shoot through her attacks, when you have to have the aim of a CS:GO player to hit anything without inraging her, it just doesn't cut it. A potential rework for the attacks, would be to make her like a shantea boss, with moving plateforms allowing the player to move more freely and times were she won't be attacking at all. The rythm would become clearer, with a phase were you focus on dodging and one were you deal damage.
3- Health. Biggest weakness of the game. Because even if I never ran out of orbs, I always got killed before beating her (and I got very close to it). You want to have only a few hit points, fine, but with no way for the player to replenish their health(and don't even mention the 2 pathetic mushrooms, they make zero difference).
A game that doesn't allow mistakes and forces you to replay it everytime you fail is nowhere near the definition of fun.
That was my potentially uselless review, filled to the brim with salt. This game has potential and it's very frustrating to see it so poorly executed. If you do continue the project, you can count on my support, but you'll have to fix your game's flaw if you want it to live, because no new player is going to play something so taxing for no reason.