The levels aren't too hard, though some are a little bit harder.
None of the levels in this tunnel took part in the Angel Missions, but appeared in the Bridge Building sidequest.
The following is a brief description of the story in the U-Tunnel. More information on the story can be found here.
After beating U-10, the cutscene 'Orbits' will begin, featuring the Duplicator and the Runner. The Duplicator whispers to the Runner asking where she put the Planet, and that he promises not to tell anyone. The Runner looks exasperated as she explains for the second time that she didn't steal it. She then leaves to map out another tunnel and tells the Duplicator to "Catch up once you realize that the Planet orbits faster than us."
The Student meets the Gentleman, and Gentleman asks her if she arrived at a solution to his affliction. The Student tells him about the rings she found on the boxes, but the Gentleman doesn't accept her answers, nor doing a test with her, as he thinks this is not valuable. The conversation ends by the Student saying," Then I don't know what you are expecting to do."
The Angel and the Student meet during the Angel Mission (The Nerd). Angel tells the Student to go home with him, but the Student says there are many interesting things to discover in space. Angel questions him by asking what she could discover in space. The Student then says there are many scientific discoveries can be done, such as:
- Gravity manipulation (Maybe talking about the rings?)
- Force fields (Maybe talking about the Pastafarian's light bridge?)
- Holograms (Maybe talking about the Duplicator's alien technology that can duplicate himself?)
- Teleportation (Maybe talking about how do they respawn?)
Then, the Angel says that he discovered the yellow rings seven years and half a month before Student and Runner. Then, the Student says there are not enough understanding about the rings unless they can build one using Scratch (Maybe they are indicating that their whole world is made out using the real coding program Scratch?) Then she insists that she and Runner can research the rings better than the actual scientist can.
Planet Stolen Edit
Upon clicking on U-1, a cutscene will begin showing a discussion between the Duplicator and the Runner about the strange disappearance of the Planet. The Duplicator tells the Runner that the Planet is gone, but she only says "It'll come back." Then the Duplicator accuses the Runner of being the one who stole the planet, to which the Runner responds, "I think I'll ignore that entirely," and the two proceed to map out the next tunnel.
(Sometime after you play the Bridge building, and you press the home button)
The Student complains about she is frustrated to push the box all over the tunnel every time she falls out the tunnel. The Runner then asks her about does she know how to teleport without moving the box as well. The Runner then tells her that if she teleports while being very calm, the box won't move. Then, if you keep on Bridge Building using the Student, you won't need to start over every time you falls out of the tunnel. It is revealed that the Student doesn't know this beforehand as before this cutscene happens, using the Runner doesn't need to push the box in every turn, but if you use the Student, every time she teleports, the box will go back to it's original location.
It is unknown why the box won't return to their original location if they teleport calmly, as the Runner says she had no idea, but the Student suspects that the tunnels can sense their emotions via the movement of the air particles, thus making the box move. She thinks that this hypothesis is unlikely to be true, but possible.
Student Teacher Edit
Upon clicking on the Power Cell doodle on the map, a cutscene will begin in which the Gentleman seeks advice from the Student. The Gentleman tells the Student that instead of Power cells being attracted to the electromagnet in his hat, they instead pull him toward them. He asks if he might have installed the electromagnet in backwards. The Student tries not to laugh, showing that she already knows the answer. The Student tells the Gentleman that 'finding something unexpected' is step one of the scientific method, and step two is thinking of a reason. The Student says that they need to test his theory, so she tells him to turn around while she brings a power cell out of her backpack. She turns it on and tosses it toward the middle of the Tunnel. The Gentleman flies toward it and goes off the screen. He presumably fell out of the tunnel as he reappears back at the beginning of the tunnel. He runs toward the Student, shouting angrily how he was shocked that she would abuse his trust and demanded that she tell him before doing anything similar again. The Student apologizes, saying that she thought he realized what she was doing. She asks him what he learned from the test, to which the Gentleman responds, "That you are not to be trusted!" and "That you consider me a grade school child!" He finally agrees that they learned that electromagnets work in all directions. The Student also bring up that there was a delay between when she tossed the battery and when it started pulling, but the Gentleman didn't seem to notice. She suggests repeating the experiment, this time with the Gentleman looking, but he refuses. As he leaves, he says, "I will retain this this power cell as compensation for your insult."
- The power cell can be any color, and may change if the cutscene is watched multiple times. However, the power cell will always be yellow when the Student is holding it.
- If you watch the cutscene at least up to the part where the Gentleman flies toward the power cell before skipping, you will get a power cell. But if you skip from the beginning, you will not get a power cell.