I got around to playing the Prism Hunter mode, it sounded too above my skill level so I had passed it initially. And I was right because I haven’t cleared it just yet hahaha. But I’m going to keep at it since I’ve gotten pretty close. It’s cool seeing the character interactions change.
Some bugs I found:
I couldn’t replicate this one, but the first time I played prism hunter, the upgrade/core shop screen is opened and shown fully cleared, and when I exit the shop chartreuse is skipped, and amber’s fight begins except instead of positioning herself into the normal dialogue position she just zooms away offscreen, so although I can read her dialogue and start the fight, in practice her and her attacks are nowhere in the screen resulting in a softlock. Like I said, though, I can’t reproduce it; after reseting the game every playthrough following that one everything started alright (I didn’t see the shop and fought Chartreuse).
A graphical detail that I don’t know whether to call a bug: When the prisms fade away, the player can move around and shoot in the area the prism is in, which breaks the graphical illusion of the disintegration. Maybe temporarily lock movement and shooting while they fade away.
Saffron’s bgm doesn’t play when her fight begins, it just stays silent (except for sfx) all the while. The music from everyone before and after her plays normally, though.
Onyx uses the “it seems the prism warriors have been recruiting(…)I’ll destroy you then your friends!” dialogue in his second phase, despite being lines from the normal mode. He starts the battle with the right dialogue, though.
Unrelated to Prism Hunter, but I got the achievement for using a black label cheat despite never having turned one on. Don’t know when I got the achievement, though, so less helpful.
Good luck with the sequel!