Cage of Abyss X Friday Night Funkin'

When i try to play the song it works fine but there is a previous page and next page dialog box on screen the entire time and it makes the undertale text box noise while i play the song and doesnt go away whats up with that

就这个fnf爽

game is getting crash whenever i try to do song, idk if im even doing corretly, can you say how to do?

bro i not understand how to open the game i used all file from downloaded file and nothing pls say

downscroll is bugged the arrows still go up so you cant see them becacasue theyre offscreen