Harbor Town: Great opening to set the scene. The piano work is very well-performed. Oooh I love the B section at 0:40 especially the roll with those colorful chord extensions. Town by ocean vibes are clear in this track!
The Ocean Spirit: The delayed mallets and the deep ambience give a really nice calm ocean ambient vibe. I like the personification of the ocean spirit through the high piano melody that slowly comes in as if the spirit is shy at first but then is ready to play.
Dash to the Docks: The drums and fast piano melody make for a fun level in your game and have me in the mood for a race! The use of 7ths is another creative way to convey the sense of racing which is used in a lot of Mario Kart track songs - nice!
Until Tomorrow: The bouncy mallets once again evoke the image of spending time with the spirit like from your second track, but the descending harmony helps convey the sense that time is running out or the day is coming to an end.
Overall: Before I even read your description, I could sense your inspiration from Totoro and/or Ponyo right away by the title and the first moments of you soundtrack! I really like the variety you’ve included here. I think that Harbor Town is my favorite - it’s clear to me that piano is your instrument of choice and the results are great here! Nicely done - thank you for sharing!