I played the game for a few hours, and would like to exchange my review with the following, better articulated review written by William Shatner (Steam edition) which overlaps with the experience I had:
"Positives:
+Custom sized puzzles which allow larger ones than most Nonogram games provide.
+Themes and theme customization.
Negatives:
-All of the puzzles are random gibberish rather than pictures (in exception to one hidden puzzle).
-The loading time of the game and of puzzle creation can be very long at times and crash the game at other times.
-Resolution restricts puzzle size (W) (H).
-Sometimes the game does not accept the puzzle (W) (H) you set and goes back to previous settings.
-Desperately needs a way to zoom in and out when doing large puzzles like (W)99 (H)50.
-Highlighting is turned off by default for some reason but can luckily be turned on as you desperately need it for huge puzzles.
-Can't make puzzles for workshop (which would be a huge plus), but you can make themes for the workshop. Which is weird and a bit pointless.
-Uses up a lot of system resources.
Neutral:
=Price. It would be a positive if not for all the negatives and the fact there is a much better nonogram game that is completely free.
It's not a very good nonogram game and can be frustrating at times. There are much better nonogram games on steam.
Picross Touch (Free)
Paint It Back (Has a demo)"