Limbo's Ending: How does it work?

If you are watching before finishing the video then hi, hope you enjoy, if you are watching this after, thanks for going into the description like I asked :D The thing I wanted to talk about was in regards to the song Dash (before it 2.2 came out). It has no bearing on anything now so don't worry about it Background footage: LIMBO - Full Level Showcase by Mindcap:    • LIMBO - Full Level Showcase   GD Limbo key part / ending (Slight volume warning lol) by Me:    • GD Limbo key part / ending   (ID: 77886177) Music: Nighthawk22 - Isolation (Official LIMBO Remix):    • Nighthawk22 - Isolation (Official LIMBO Re...   00:00 intro 00:14 Rules of Limbo 01:12 How it works 05:02 Improvements and optimizations 06:43 End screen