Ms. Chamberlain is excellent at constructing escape games, and these are no exception. They are challenging without becoming frustrating = fun, and a good exercise for your brain. She needs to refine her coding skills, however, and that's the reason for the loss of a star: if you leave without finishing a level, it resets and you have to start over. Also, there is a glitch in stage 10, wherein supplying the correct number from the fingernail book does not trigger the appropriate response. Nevertheless, keep up the good work.