Found a glitch which puts the time to zero. You preform it by collecting the milk and after that, falling into the void. After touching the voids death barrier you can press reset or next level on the completion screen. Now you will need to complete the level again without dying or pressing escape. If done right you can get the time display zero.
You can get zero on every level except escape 1 (As far as I know). Tutorial and sandbox 0 was the hardest to get zero on.