Awesome job bringing this music to life with your illustration!
I love how you've painted in various metallic / material objects being pelted by rain to emulate the sound effects in this music, and tie everything together. The character appears to be crying, but the music persists as kind of upbeat -- which is a conflicting detail that I think is nice. Rainy days are always a bit glum and gloomy, but there's something nice and distracting about watching them.
If I had to critique anything in particular, (and take this all with a grain of salt, because it looks lovely as is) I would recommend thickening the lines of anything in the foreground to imply that it's closer to the viewer, and thinning the lines of the details in the background. Rain tends to obscure the details of background elements that are far away, making them sort of faded, so less black and thinner lines can help to imply that and create a sense depth! (here's an example of what I mean in an image with heavy rain: https://images.app.goo.gl/3YQTjDsb3kRaALXF6)
All in all, though, I really like your interpretation of this song, and the character you've created. Perfect choice of medium for such a wet environment, too. Lovely work!