This is really not that hard to get as the game is more about high scores than dying!
Simply use the first 5 min score attack on championship 2 map, stick to the route the game is guiding you on and the ghosts will just follow you about, but should you find yourself stuck with no escape use the 'pinch out' motion to ignite a bomb and send the ghosts on their way, You gain bombs as you go but at the most you should only need to use one. Try not to eat the ghosts as it will speed them up somewhat. Once the 5 mins finsh you will receive the achievement. Congrats!