This is a really amazing concept! It took me a moment to figure out that you could mark squares as empty without it counting as a marked square, and that the nonograms continued between battles, but otherwise I loved it!
I do have some accessibility concerns though, the bouncing text was very difficult to read as I react poorly to quickly changing or flashing light. The "Thanks for playtesting" screen also was difficult for me because of my reactions to flashing lights.