|Normal gameplay||Bridge Building|
| This level is hard!
This level is rather difficult. It can challenge veteran players and most beginners cannot finish this level. Most players consider it to be a hard level. Even elite players may have trouble beating this in one attempt. Good luck in beating this level!
This is level 8 of the U-Tunnel.
In this level, the platforms are extremely narrow, about only one tile wide of landing space. The gaps between platforms can be extremely wide, so you may need to jump sideways to decrease your speed, thus letting you run sideways on the platforms easily. There are also ramps in this level, but it is recommended to jump on the ramps in order to jump a farther distance, and try to remain in air. That's why it is strongly recommended to use the Child. The Duplicator is also a great choice, since you can use the duplicates to jump with you, thus enhancing the probability of beating this level. The anti-gravity skills of the Student is excellent, since this can let her jump across a large distance, but just to be careful that you won't flip to the ceiling during your jump.
There are also boxes in this level, even increasing the difficulty of this level. They can block your jump making jumping hard, and if you carelessly walk onto the walls of the boxes, you may suddenly be scared of the sudden change of your location. This can be frightening and may let you lose the level easily. Fortunately, the boxes aren't all spread out, instead they are just concentrated in some places.
It is highly recommended to run onto the seldom straight rectangular platforms till the end. This can make you have much progress without having the risk of falling. When you reach the edge, jump again to seek out another platform suitable for you.
Yes, this level is extremely long, one of the longest levels in the game, but if you can work out those tips above, I'm sure you will be able to beat this level in no time.