Thank you for playing and for your feedback,
I didn't think about the confinement while doing this game ! But I did hope to have the players make up their own story, like in Inside. There was more or less a story to find out, but I didn't have enough time to add enough details to flesh it out. It's the story of a research lab that got abandoned after a disaster, and the player is the cause of the disaster. If you look into each dimensions, the bottom one is the first in the timeline, all the others happen after the disaster ( chairs are thrown away, vegetation ramps up.. ). When you get to the end of the game, you have no choice but to let yourself fall straight in the bottom dimension, which is to say the earlier one.
If I'd got more time, when reaching the ground I would have created a nice animation of the upper dimension disappearing, and something like an explosion or chemicals leak to show the disaster happening and explaining the abandon of the lab.