Hello (Late Comment)
I just Wondered How did you make them more speedy Over Time
Awsome Game!
But (I know i reccomend this a lot)
Use This For Music:
https://musiclab.chromeexperiments.com/Song-Maker/
If you want a options menu I highly Recommend Watching Brackeys video On It
GG(ITS HARD!)
Well I could Attempt To do Sound Effects
Or if you want to do it yourself i recommend using ( for songs)
https://musiclab.chromeexperiments.com/Song-Maker/
And For Sound Effects
Hope I could Help