How to Make a Rhythm Game More Flexible

I feel like it's so easy to look at something like Necrodancer or Spelunky and kind of identify those layers that you're talking about in retrospect but it seems so hard. I always try to think of what things would make sense to players and then I try to think can that thing apply to the game. So yeah I did specifically try to add depth by making layers intersect each other and yeah that generated some of the complexity for sure. We experimented with different bpm's a lot just to see what felt right and we're pretty lucky that the range of music that seems high energy and interesting also happens to be fairly good for uh the difficulty level because you don't want it