Finally managed to play the game! Apparently it had to do with the itch app!
The game was not only beautiful, but really cool to play. I love rythm games :D One thing i would have liked, was that the arrow in the book would pre show me what arrow will arrive next. That would be rly nice!
Oh, I didn’t know Itch had an app! It looked like the downloaded version because it shows the original file names for the game, 'potion-beat' haha. But thank you for playing! That was my initial plan for the arrow, but I didn’t have time to implement it. T_T