Finally tried to play this mode, but I kinda feel it's difficult to get started properly. For instance, some maps differ in the amount of keys they have. Some have 4 and some have 5. What's the button for the 5th additional key, and why throw players off by changing the amount of keys of the song? It completely changes the way you need to play because you need to learn to play with the additional keys. It'd be like introducing additional game objects in standard mode. Also, some easier difficulties seem to have ridiculously high scrolling speed. Is it really necessary that early?