Thank you so much! And yeah, I did give the option to rebind the keys in the main menu settings, I went with ZX NM so that it kinda nudges you to use two hands, because that's best.
As for the difficulty... yeah lmao, kind of a symptom of me composing the songs first and then reducing the notes to 4 lanes. Glad I planned from the start that progression wasn't based on performance in the games haha.