@Ara Thanks for the huge compliment!

Oh my god, you selected the most fitting songs for every stage and boss level! Take a little award.
I'll come back to this thread if I happen to find any slight issues. o/

Glad you like it! I'd say some of the hard timings were inevitable because Camellia's music always makes the hardest charts in various rhythm games, so NecroDancer kinda couldn't completely avoid that either lol. Especially I don't recommend spending too much time on 5-3...

So far the most unique soundtrack I had ever heard....Some beatmaps in that songs gave me screech sound for missing the beat, but otherwise it is a happiness listening to it

very interesting insight

Basically, I made "short versions" of most of the tracks to fit within the limits of the game as possible. They also couldn't be shorter than original, otherwise they leave a silence in the end of the level.
I just manually cut out and sometimes crossfaded some sections to make them "jump", making sure they feel as seamless as possible.

For example, in the case of "Nasty * Nasty * Spell", I cut out 2:23 ~ 3:45 from the original so that the last breakdown is skipped.
Meanwhile, in the case of "D0 U K|/|0VV D0|/|K3\ K0|/|6?", 2:11 ~ 2:33 were shortened to last only 9 seconds, by cutting and crossfading. (because it did not feel seamless just by cutting it)

And FYI, they extremely care about the length (beatmap change, technically), so even the training track can't be longer than the original without breaking leaderboard compatibility lol.

I'm curious, how did you adjust the song length to fit the game's time limit? Or does leaderboard approval not care about that?