Rolling Down to Old Maui is a traditional sea song / sea shanty.
Here is an arrangement for piano solo.
Level: early intermediate / intermediate.

Lovely Piano is a book of more than 25 beautiful piano solos:

The Skye Boat Song (Main Title of Outlander)
Wellerman (famous sea shanty on Tik Tok)
Nearer my God to Thee (Titanic sinking song)
Lavender's Blue (Cinderella's Lullaby)
Canon in D (Pachelbel)
My Mother Told Me (Vikings Song)
Lake Swan (Tchaikovsky)
OYFN Pripetshik (Schindler's List : red coat girl song)
Amazing Grace (Christian hymn)
Waltzing Matilda (Australia's ballad)
Autumn Rain (Original)
Sleeping Beauty Waltz (Tchaikovsky)
Qui peut faire de la voile sans vent (Folk Song)
Brahms' Lullaby
Spring Walk (Original)
This Little Light of Mine (Popular Gospel Song)
The Fireflies Dance (Original)
The Drunken Sailor (Sea Shanty)
Mystic Walls (Original)
Rolling Down to Old Maui (Sea Shanty)
Sailor's Song (Original)
Isabeau s'y promène (Traditional)
Le Petit Matelot (Traditional)
Little Fairies (Original)
Little Princesses Dance (Original)
Loch Lomond (Traditional Scottish Song)
Poupoune d'amour (Original Lullaby)
Scarborough Fair (English Ballad)

Level: easy piano to intermediate.