Thank you for the confirmation on 13. I understand the time constraint and am amazed by how many levels you managed to make. I played another puzzle game in this jam that was very nice but disappointingly ran out of levels right after introducing the second mechanic. You seem to have dedicated about 2 levels to each mechanic and made a very dense game as a result.
The one way blocks necessarily being 1/2 a block wide was always going to make them a bit harder to see. I'm glad you were able to improve it from whatever the original was.
I do appreciate that your game gets its difficulty from logic and not just difficult timing as many "impossible games" do. I always felt I was making progress or on the verge of learning something new about a level with each attempt.
As for a ghost replay, that would be a very unique approach to difficulty modulation for a puzzle and I think it would work well.
Thanks for pointing out the play-through. I can see the logic in the solution now. It's a good puzzle. I just wasn't ready for that spike in difficulty.
I look forward to playing the updated version of this if you choose to continue the project.