The Music Machine is now up on Itch.io: http://jefequeso.itch.io/the-music-machine
The OST is also up, on my bandcamp page: https://davidszymanski.bandcamp.com/album/the-music-machine-ost
And the official release trailer is up on Youtube: https://youtu.be/rTYP3qRfG5U
Once again, barring any unforseen difficulties, it will be releasing on Steam on Wednesday April 29th, but if you just can't wait, you can purchase an itch.io version and redeem a Steam key later.
Now to go breathe into a paper bag and wait to see what happens.