In short, Rhem 3: The Secret Library has one audience, and that is truly hardcore Myst-style adventure/puzzle fanatics. This isn't a bad thing, as niche games can be quite enjoyable. Unfortunately, the game's lack of presentational quality weakens it to the point that it has no ability to pull in a larger audience. It may even go so far as to alienate existing fans of this niche subgenre. This is unfortunate because if you can get past this factor, the puzzles can be sincerely interesting. While Knut Mueller (i.e., the developer) has great potential in puzzle design, they should look into getting more and/or better artists to match that potential.