Fun idea, you're game write up page was funny too. I am normally terrible at these sort of puzzles, where there's one gap and you have push everything around. But your twist on the game made it actually more accessible for me, as I was able to shuffle things in ways my brain understands more! I tried a variety levels from 5 up to 69, and succeeded! the 2 bit style did make it harder for me to identify some bits that were out of position, but overall it worked really well!
I'm glad the real mona lisa was not harmed in the making of this production! Thanks for getting involved in the jam!