Great game! I love the 2.5D aspect of it. Impressive mechanics that work in favor of the theme.
Personally, I had a hard time managing the floors, accidentally unfolding them when I intended to fold more in a row.
The endless-style gameplay made it feel unnecessarily hard; I had no simple goal to work towards. It might have benefited from some milestones or simple goals at the earlier stages. But I think that is a personal grievance of mine, not a fault of the gameplay.
Good job!