| 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.
This is the first level of C-tunnel.
Since you must use the Student to pass this level, so there are no any suggested characters.
The usage of the Student shouldn't be too hard for you since you must have already known how to use her during the Bridge Building minigame. Therefore, this should not be too challenging.
But be careful. This level is quite hard, and the gaps are large. Make use of the special abilities of the Student, and change gravity when needed.
In this way, you may pass this level with ease.
There is a cutscene that featured in this level in the game. More information about this can be seen in this page.
Morning Hypothesis (Part 1) Edit
After beating Level C-1, we see the Student sleeping between Level C-2 and Level C-3. She then wakes up to grab a green "something" from her backpack, and saying "Good Morning, universe!" After that, "Now for my practice hypothesis... What should I test today?"
After playing this level, you can see that the next level has also 5 sides, which is the same to this level. Moreover, there are quite a number of normal tiles, and other tiles with special qualities aren't seen yet. But it would still be very likely to include one.
Strangely, the gap between this level and the next is unusually small.The cause is still unknown.