Hi and thank you! The point is mostly to just make music in this iteration. Any challenge modes will have to be a future project, but it would be a sort of "complete this objective to unlock this feature" kind of completionist game. We also wanted to implement a resource based economy and recipes to use those resources to spawn the mushrooms and power them up, but unfortunately we ran out of time.
So, right now, it's just a very pretty music maker with no challenge outside navigating the slightly obscure music sheet, haha