Nonozle is a game where you use number logic to fill out and solve puzzles that form images. It's a type of puzzle known as nonograms, and features in games like Picross.
It has 200 puzzles, tons of customization options, and a relaxing electronic soundtrack.
Here's the game's page on Itch.io, where you can get the game on its own or bundled with the soundtrack for a dollar more. You can also buy the soundtrack separately here.