The concept is pretty good and novel, which make it a good fit for the Nokia. Navigating through the traps can be a tad difficult, since you have to switch between the hint screen and mini map. It's most certainty quite complicated, as evident by the fact it asks you to bring out pen and paper, but that's the intention. My final grip is that an error pops up whenever you press a button after reloading. Overall though, pretty good.