Thank you! We actually had a lot of issues with the final challenge. We tried placing the 8th tile in various spots, counting inversions, but it was all a massive head ache and we ended up (don't tell anyone) hardcoding the final puzzle in -- so in theory it should be solvable each time. I can definitely see a world where moving the tiles between cutscenes or doing something funky could cause an unintended inversion which is sad to hear. Or maybe the goal state you input was one swapped when it wasn't? Who knows! Thanks for playing tho, I'm glad to hear you liked the pacing and puzzles leading up to it!