I really liked your story for the theme and I think it worked great as a 4 act structure in the music!
I think the first song feels a little too different from the rest as I got a bit of whiplash from that song to all throughout the sky one remains.
speaking of, my main bit of advice is for the second and third songs. I think they need a better hook at the start because as is they both sound very strange and a tad off-putting at the start. Like, compared to the first and last songs, those feel a lot more professional compared to the middle 2 at the starts.