I've seen similar games like this before but never knew how to play them. It still seems a bit complicated but really cool that you were able to create a portrait out of it! I'd definitely play more levels of this to unlock different faces or something!

I also did a tile-based game and can understand your struggle with arrays. I've never heard of nonograms and they're so fun!

With this, I've now learned what a Nonogram is. This game is fun and a good challenge––very well constructed.