A pony fan named PrincessWishes shared a new resource for the title theme. She made a great sheet music transcription of the theme song. No matter how many times I listen to it, the title theme still makes me feel happy inside.
You can find the sheet music on Noteflight and give it a listen—or try playing it yourself! You can also visit PrincessWishes over on Youtube.
Thanks, PrincessWishes, for sharing your musical talents!