There is a nice balance between original art and retouched photographic elements in Agatha Christie: Peril at End House. The end product works well enough to keep the search interesting as you move from location to location. There are plenty of areas to explore in the game and a variety of puzzles introduced between major chapters that mix up the fun. The puzzle components are introduced as actual table-puzzles, matching pieces of newspaper and filling in cut-out newspaper pieces to complete a puzzle. There are also smaller puzzles buried in some of the backgrounds and presented through hints like, "teapots in a row." There are also puzzles that connect to the story, testing your memory of what each character said along the way and the clues you unearthed.
There is nice music looping through the game, interesting enough to catch your attention and admiration, but not distracting. There isn't any voice acting in the game, but there are some rather poorly drawn panels as in a graphic novel, that move the story forward between major sections. In an otherwise classy production, it stands out when things look amateurish.