An unhelpful directional arrow while driving and inconsistent vehicle/character interactions lead the list of notable issues (along with crummy animations and occasionally glitchy sound effects), but such problems aren't at the core of what's wrong with this game. Rather, it's the soul-crushing repetition and menial tasks that conspire to ruin what should be a good-natured romp through the world of public safety.
Playing the same boring minigames over and over again in each stage (sometimes five or six times, without deviation), coupled with simple driving tasks and a lack of significant variation between missions make this a joyless grind with little reward. Ubisoft's upcoming Emergency Heroes (also for Wii) might offer a better take on the theme, but regardless, Emergency Mayhem is one call for help you're better off ignoring.