3 1 0For the saw part of the achievement/level it helped me to memorise the specific sound the saw made when it was super close to me which was unique so I could just jump exactly when that sound came on.
1 0 0From TrueAchievements: https://www.trueachievements.com/a195725/ding-achievementOn the PC, start at the chapter with the flying insect in the thumbnail.