Juno 06 has been going through some changes this month. Earlier, there was a change to the game's official cover art. Now, the game's soundtrack has been updated. An additional 6 stage themes have been added to the game, which will show up in the mid-late game. Also, the game's soundtrack has finally been released to Steam. You can find it here:
https://store.steampowered.com/app/2382690/Juno_06_Soundtrack/
Soundtrack Update/Release
Source: Steam Community (opens in a new tab)