I had seen a couple videos of the Japanese version of this game a while back. Truly this is one of the finest examples of "bullet hell" that I've seen.
Looks like fun. :3
Hardest boss ever?
Yeah, I know that's actually Mushihimesama Futari, and I also know that plenty of other shmups have True Final Bosses that are just as ridiculous on their highest difficulty setting. But wow. This game is slightly easier than Futari, but Ultra difficulty is still pretty darn crazy.