Some notes:
- In the Modifiers Menu (press CTRL in Freeplay Menu), you can change the speed of the MUSIC by changing the Playback Rate value. And you can change the speed of the NOTES by unchecking the Chart Dependent Scroll Speed option and changing the Custom Scroll Speed value.
- You can change the skin of notes by going to "Options > Visuals & UI > Note Skin". Currently, there are only 2 note skins and I plan to add some more in the future.
- You can change the characters by going to the Editor by pressing 7 when playing a song. This is not a permanent method though, as when you quit the game, the characters reset.
I appreciate your suggestions, I will think about adding local multiplayer and customizing the combo position.