Nonogram World got deleted from itch.io about 3 months ago (that's about how long ago the last run was at the time of writing this), and it doesn't seem like it will be put back on the site. I did a little bit of experimenting, and I found out that you can still play the game via the wayback machine. If anybody needs the link, http://berry-jam-games.itch.io/nonogram-world