Nonozle

If you've never played this type of game before and are unfamiliar with nonograms/picross, there's a few free ones on Steam like Picross Touch and Picross for a Cause. You might consider trying those first to make sure you like this style of puzzle. If you are familiar with nonograms/picross and enjoy that type of puzzle, then you'll probably love this game. All the standard quality of life features are present along with a bunch of fun options. It took me ~38 hours to complete, so it's a good amount of content. There's no DLC achievements. Some of the puzzles are called 'abstract' which just means they don't reveal a picture like standard picross puzzles. I'm not really bothered by that, but it bears consideration if that's something you value in a picross puzzle. I'm a huge picross fan. I don't have any complaints about this game. The difficulty was perfect and the controls were great. The price is very reasonable for the amount of playtime you get. Plus, there's workshop support and a randomized puzzle mode. Excellent game.

Nonozle is the single best Nonogram puzzle experience on PC, And there's a frankly absurd amount of customizability for the UI and controls so you can get the experience dialed in exactly the way you like it. The included puzzles are very fun on their own, and combined with steam workshop support it'll take quite a long time to run out of content.

Very fun and straightforward nonogram game. With 300 handmade puzzles and infinite random puzzles after that. I enjoyed every minute and often come back to it for a new puzzle or two.