Thank you for stopping by! Funny enough, I've planed on adding all the things you've listed but ran out of time.
Yes, you're supposed to make a constellation shown on the prompt. One of the screenshots on the game page reveals the solution for the Ursa Minor. (Thought the position of a constellation dictated by the sextant is randomized every time.)
I will pass along your comment about the music box melody to its creator; she deserves all the praise c: