Me and Beesechurger both discovered a way to skip majority of lvl 0 and go straight to the no-clip zone (that leads to lvl 1)

We discovered that if you go to any pitfall, walk on the beams, then look up on the ceiling, you should see a dark circle of mold. Go to the hole below the mold, then jump. You'll land on a mattress and boom, your on the way to the next lvl baby B) Just look around for the yellow tape (if not spotted, look through the other halls until you find the another pitfall zone. In that pitfall zone, there should be a yellow line like the one on top. Follow said line until you reach the no-clip zone. :3