Hello Teddy!
Sure, I can help you, but you need to PM me and tell me where you've found the previous music sheets. (Actually, I'll send you a list.)
I haven't developed games in a while due to drifting from the fandom and school, but thanks for the comment! It means a lot (and brings back so many good memories - ouch XD)
I used RPG VX ace to make this game! If you want to try, I'm sure you can find the trial version and tinker around! It's really easy to start, don't let your ideas be dreams! You can always ask me for help on discord.