Will v.13/v.14 come out for everyone or do we have to be on patron to get the new versions?
Viewing post in SpunkStock: Music Festival v0.12 Demo comments
At the moment, Patreon is the only way to get early access to the new builds while the game is in development. The full game will release on Steam, and Itch for purchase later this year. There is a chance that I will open an Early Access on Steam for recent versions in the future though.
That being said v0.12 is the full "Free public demo".