Man...this actually hit me in the metaphorical balls worth of goodly nostalgia. God I loved both the (what was a critical failure) of the Nemo animated movie (which I am pretty sure was done by the studio that basically became Studio Ghibli before they became famous) and the old NES adventure. Dream 5: Nemo's House was one of my favorites of the OST, next to Dream 4: the Night Sea and Dream 7: the Topsy-Turvy Ballroom. Those and Nightmare Land were banging for me as a kid... Damn, if I had the rock n' roll chops I would do a Dream 8: Nightmare Land heavy metal remix!
That said, this is actually pretty damned good and sadly too short for me. And yeah, it does start to sound a bit like a sea shanty towards the end. xD Love it. 5/5 from me. :)