Because there's more rad stuff where that came from. Developers Honeyslug partnered with electronica label Ghostly International to produce the game's soundtrack, which you can listen to below.
It's stuffed with tracks by Tycho, Com Truise, KILN, Shigeto, and more, all providing a soundscape of crackling beats and hazy synths perfect for traveling the psychedelic seas.
Ringo may have inspired the game's look, but this hews closer to Nujabes's rays of sunshine.
The soundtrack officially drops August 12 along with the game. Go get wiggly.