Played both on Windows and Web (Firefox)
Almost every chart has some issue, to name some examples:
- Sigma Boy: Ends instantly
- Hide Away: Ends early (after 98 combo / ~55 sec)
- Mangos: Notes move at super speed, making it unplayable
Tried different characters, difficulties and life meter options as well, with no differences afaik
edit: one chart that works fine is the DanTDM theme
Also I should add that in the ends instantly/early cases, you do get put into the results screen (not game over), and the song keeps playing while on it