The term "roguelike" gets way too much airtime these days. If anything has permadeath, it's instantly a roguelike. If it takes place in a dungeon -- "roguelike!" But the original Rogue's core mechanical element was its grid-based gameplay, where every action by the player warranted an equal and opposite reaction, adding a puzzle element to the mix.
Road Not Taken operates very closely to the formula of the original Rogue, but doesn't really hold that premise as well as it should throughout.