Really enjoy the game and music, will it be possible to buy the OST at some point?

I recognized at least one public domain tune, so I'm curious how much original music there is and if they could release an ost with any public domain tracks.

There you go:

License: https://filmmusic.io/standard-license":

"Hyperfun" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3891-hyperfun
"Mister Exposition" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4061-mister-exposition
"Silly Fun" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4360-silly-fun
"Loss" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4003-loss
"Long Road ahead b" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3995-long-road-ahead-b
"Shades of Spring" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4342-shades-of-spring
"Gregorian Chant" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3825-gregorian-chant
"Babylon" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3406-babylon
"Variation on Egmont" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4579-variation-on-egmont
"Walking Along" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4603-walking-along
"Dances and Dame" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3585-dances-and-dames
"March of the Spoons" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4021-march-of-the-spoons
"Spy Glass" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4410-spy-glass
"Lost Time" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4005-lost-time
"Voltaic" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4596-voltaic
"Chill Wave" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3498-chill-wave
"Mourning Song" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4086-mourning-song
"Inspired" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3918-inspired
"Supernatural" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4445-supernatural-radio-a
"Touching Moments Two" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4539-touching-moments-two---higher
"At Rest" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3388-at-rest
"Overheat" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4186-overheat
"Mourning Song" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4086-mourning-song
"Doobly Doo" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3667-doobly-doo
"Marty Gots A Plan" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4992-marty-gots-a-plan
"Beach Party" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3429-beach-party
"Rite of Passage" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4291-rite-of-passage
"Rites" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4292-rites
"Sneaky Snitch" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4384-sneaky-snitch
"Virtutes Instrumenti" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4590-virtutes-instrumenti
"Devastation and Revenge" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3644-devastation-and-revenge
"Theme for Harold (var. 3)" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4518-theme-for-harold-var-3-
"Basement Floor" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3419-basement-floor
"Cool Vibes" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3553-cool-vibes
"Echoes of Time" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3699-echoes-of-time
"The Escalation" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4493-the-escalation
"Breaktime" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3457-breaktime
"Aces High" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3337-aces-high
"Night on the Docks - Sax" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/4129-night-on-the-docks---sax
"Kool Kats" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3956-kool-kats
"In your arms" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3906-in-your-arms
"On hold for you" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/6928-on-hold-for-you
"Fast talkin" by Kevin MacLeod Link: https://incompetech.filmmusic.io/song/3740-fast-talkin
"Cylider 9" by Chris Zabriskie: https://www.youtube.com/watch?v=g3ItmyJcw74