As an avid fan of RE4, this was a great time. It took me about an hour and a half, and the puzzles were always fun. It threw new mechanics in at regular rates, so the simple concept never grows stale. I do feel the presentation could use some work. Sound effects are satisfying, but the music is just one looping track that sounds somewhat generic. The visuals are pretty spot on to the source material, but having some changes in lighting and music as the game progresses could have made things more interesting from a visual perspective. What you have here is just a set of 40 fun puzzles. And for the 3 dollar price tag, it justifies it's cost. I'd recommend it.