I'm going to say right now that I really enjoyed this adventure. It's short- only two or three rooms- and few puzzles, but it's very well developed and maintained to keep a little horror in the main character. I will also say that the story is rather confusing during parts, but In my opinion, this adds significantly to the story. It's designed so that you are in constant 'fear' and in complete bewilderment, not knowing why things happened or where the heck you are. I mean come on, you're in a mysterious lab with frightening beasts, locked doors and other instruments, so it's bound to be a somewhat creepy story with unexplained happenings.
Critical breach is very linear, short and simple though. Puzzles are obviously aimed at the beginner so don't expect too much. What the story does have though, is fairly well done. The beginner will be pleased with the variety of tasks needed to complete the adventure, from finding a way to 'escape' the mysterious beginning to doing simple puzzles, and using the limited tools to solve problems. This adventure gives a toolbox of activities which will be needed for future, harder adventures.
It's no zork, but critical breach is perfect for the IF beginner