What an amazing game
I'd rather be playing Shovel Knight right now but there's work to be done and the guilt that would ensue would be too much for me to handle. Thankfully, Jake Kaufman's original soundtrack for the game is up on Bandcamp and it can be streamed for free.
You can also pay what you want to own the album. My favorite tracks are probably "The Fateful Return (Tower Approach)" and Manami Matsumae's "A Thousand Leagues Below (Iron Whale)" but I played through most of the game over the course of a few sessions and need to reflect on the entire soundtrack before making the call. I'm surely forgetting some songs.
There's also an official arrange album for Shovel Knight if you somehow need more.