|Normal gameplay||Bridge Building|
| Be careful!
This level or achievement has been known to feature a bug. Please attempt it with caution.
| This level is a major plot point!
This level is a major level in the game. After you finish the level, you may be able to access other characters, minigames, and tunnels. Most of them also include a cutscene.
There is no strategy. The Box stays at its own location even after you respawn, so it makes this easier. Though, after you respawn, the Crumbling tiles you knocked out won't come back to place as well, so you need to beware and avoid crumbling them.
However, if you fail too many times with at least 1 tile crumbled, the Student tries again, resetting everything in the level (including the box).
There is a bug in this level. The box doesn't have to be at the end to initiate the cutscene and go to N-1. (One can even do this without pushing the box at all.)
However, when you click the U-8 box again, it will load back to this level instead of B-7, as the game does not think that you have beaten this level.
There is a cutscene that featured in this level. More information on this cutscene can be found here.
Crossing the Gap Edit
After you use the Student to collect a number of boxes in the Bridge Building minigame, when you push the last box to the rendezvous point in B-13, you will meet the Runner with a pile of ringed boxes. Then she asks the Student if that's enough, and the Student says it is. Runner still thinks it is not enough since they can meet another large gap like this, but the Student says she planned ahead too much and says she doesn't want to collect a hundred more boxes. The Runner agrees and they jump across the boxes and reach the N-Tunnel.