Solid Void Art Nonograms

Mostly loving this collection. If you enjoy nonograms you will enjoy this game. Generally a relaxing puzzler. My complaint is that some of the puzzles have solid backgrounds and visually interchangeable pieces. Unfortunately those pieces need to be in specific locations to succeed in solving the puzzle. One puzzle left me with multiple black pieces that could be rotated and/or interchanged turning the final solution into a combination lock I couldn't solve.