First of all, I’m glad the previous reviewers were happy with their puzzle. We had some problems. Several of the pieces did not fit together well. When we had only the dark background to work on it was pretty much a slog. The puzzle pieces are all one shape so it became a matter of trying every piece in a single spot! Obviously that wasn’t worth it so we quit. I think you should use a different puzzle design so the pieces are varied. Then even if the puzzle is difficult there is still some entertainment value and you have a fair chance at it.