How? It's monochrome.

Well ignoring the fact that some clicks which are clearly supposed to be synced aren't (and my rating sure doesn't ignore), the sync is really good. It's honestly kinda hard to go wrong with this song's non-drop parts because the lines of portals/pads/whatever are just a sensible, intuitive thing to use with those notes (see also: Fairy Knife Hell). Outside of sync the gameplay also has some high peaks (40% memory wave, 43% dual, 58% repeating segments especially, 70% dual, 95% dash orbs) even if everything else is pretty basic with at most some camera movements.

That splitscreen UFO exists. It certainly exists. I can say that