The opening noise is a bit raucous.
I like noise—don’t get me wrong. But it’s a bit more difficult.

I love harmonica and I love tuba (and, indeed even the idea of tuba is fun), so you start with some kudos from me. I love the harmonica lines here. Kudos also for originality.

Here the issue is mix. It’s all a bit unwieldy. But I like the originality of your idea here.

I’d love it if you would upload your harmonica line as a sample. I could use that to make new synth drones that I’d enjoy remixing. I do my own harmonica lines for this purpose (and, indeed, don’t really play but use it to make drones).

You got the vocals to work okay here, but the mix in general feels muddy and less than optimum.

Yet every time I hear that harmonica, I’m happy. This one doesn’t rate a high rating from me, and yet I enjoyed the sense of fun anyway.