I am rating Octoburg, since that song is the actual 'town' one, but honestly, I love Ink Shop too (and the funny squidy noises xD)!
Maybe I am a bit soft, but I gave you a 5-star rating in every category! That obviously does not mean "you are perfect, don't change" - always strive for improvement - but I do feel your song matches every criteria impressively! It captures the underwater vibe; the instruments are delightful and nicely used; and the melody is fitting, upbeat, and perfect for a town! Well done.