Nah, act two has been used in a different map already... and it has a kinda depressing vibe to it. I do like it though.Been watching since the beginning... and I fell in love with how detailed everything is! Truly beautiful!
For the music situation, I recommend using the OST for Sonic 1 Definitive by TheRedInferno. Personally, I prefer Act 2's music.
I do wish the absolute best for this map, as this I know will be very popular! I wish the best of luck!