The L-Tunnel branches off the Main Tunnel at Level 55, and is accessible through Level A-9, and so is Level 56. You should be fine with the Runner, but the Child and Pastafarian could provide some help should you need it.
There is a cutscene in this tunnel. More information can be found on the Story page.
This cutscene shows the Skater constantly trying to pass Level L-4 without success. The Angel turns up and tells the Skater to wait. He says The Skater will have an easier time if he takes off his skates. He replies saying skating is fun and also says "Don't knock it until you have tried it." The Angel mumbles to himself saying some people use tools to solve problems...
- This tunnel is at first unlocked by beating Level 56, but it was later changed to require you beating Level 55.
|Not too easy|
Difficulty of the Levels of the L-Tunnel