I managed to get to wave 10, I think that's the last wave since there's no more enemy being spawn and I think it would be impossible to get there without the placement bug.
I thought this game had an ending or something else because of the dialogue at the start, so I played it for a while in normal mode, for 20 minutes straight, until I realized it probably doesn't have any ending other than me and the game over screen.
Apparently, I don't see any notes or a way to play the game. I tried waiting for the entire duration of the song on every single difficulty in freeplay, but I still don't know how the game works (or if the chart was blank in the first place).
However, once I tried creating my own chart as a test, it had some notes, and the game itself actually worked. I think the default chart provided in the free play was broken.
