We planned the game to last bewteen 15 to 20 minutes but once published we saw some people got stuck at the puzzles, so the duration will depend on your ability to solve them.
The game doesn't have any save options, so you didn't miss it. Also we do not plan to add new features (we consider the game finished, as it is a student project and the course already finished). Sorry for the inconvenience of having you repeat the same sections of the game, but the game should be very short when you know how to pass through the puzzles.
