You are fairly free to examine the seemingly open world of Keepsake. Although in the end you will still need to get from one crucial point to another, in between the game leaves you the choice in what order you'll solve the puzzles or visit certain places for clues. Some of the puzzles require that you solve others first, but otherwise, there's no real scheme to be followed. You'll need to use your brain to be able to proceed in the game, and try to link the puzzles and events to each other. This creates the illusion that you really take part in the game and its story, instead of just following a predefined line.