Is Jack stuck? or am I a bad jumper?

[dlcatftwin]

Hello Semi-Native,
Thanks for the response.
Yes, once I accomplished the

blind side

of the inverted room, I went to the left and finished the ladder maze, which appeared self-contained (I finished the maze by arriving at the same spot as when I started). After that, there was nowhere to go but back down the blind side of the inverted room, and back to the present position you see Jack in (in the picture).
Thanks again,
DLC