The very first patterned door was pretty confusing as it gave off the clear impression of a glass door looking into a striped hallway. Everything else was pretty clear. Visual novel controls would also be nice to have, particularly dialogue lookback.
I like how the puzzles are grounded in consistent logic, most intuitive approaches (other than 'just rip the tape off the box') work as expected, and there's fun responses to trying to use the lighter in inappropriate places.