Hi & thanks for your feedback!
I guess you're right, the description is a bit promising ;) I would argue that this isn't unusual in any kind of game, be it indie or AAA.
For how to find relevant elements, I totally agree that some indicator would be good. I'm not sure how much effort this will take to implement in a meaningful way, though
In terms of the feedback for instruments, this is already fixed/improved for the post-jam version.