So, I just tried this. I've never played Phantasm Romance before, so all I knew to expect was that there was going to be some weird maze stuff.
I had to use the directory option for this, since selecting Stage crashes danmakufu on this for some reason... Maybe that's known, I dunno.
Anyways, I found it odd that there was no dialogue, but not as odd as the fact that none of the characters got a name under their health bar, or an ENEMY bar at the bottom.
I liked the danmaku, though. The difficulty wasn't too off the wall(I was able to 1cc it my first try... barely. Nothing quite like going through the second half of the final boss with no lives or bombs on your first run). But what is this about alternate stage destinations? I didn't see any sort of in-game mechanic that would facilitate such a thing. What, precisely, are the requirements for each branching path?