Well, as I tested it was easy to die because of the scrolling platform so I decided to increase the health or it's gotta be too hard.
I didn't have time to do the music though.
I'm not that good with music, and I can't make something without including a mute button, so I just find some royalty free music and put it in my games.
I don't really know if you're good with music (don't wanna assume anything), but if you don't have time or can't, that's an easy option to bring some life to your game!