This is the fifth level of the Main Tunnel.
This is a large contrast to the last level. This level needs you to jump through platforms, and this requires changing gravity. If you know how to change gravity, this level should not prove to be a large challenge.
If there is a small hole in front of you, you should use short jumps instead of a long jump. Release your finger immediately after you press the jump button can let you jump in a fast and short manner. This can prevent you jumping so far away and land into another hole.
There are two different ways to help you in transitioning the process of the gravity-changing.
First, you can do a large, high jump and you will reach into the air, high and sometimes, there is nothing below you. Don't panic, and move you character to your preferred landing platforms on the wall and it will automatically stick to it. Just don't relieve yourself when you finish the process. There may be furthermore hazards awaiting for your character.
As for the second way, it requires that the platforms must be stuck together continuously, just like the one shown in the screenshot. Just drive your character to the wall at full speed and touch the wall before it reaches into the endless void. You will then stick onto the wall, and continue this level.
Just be careful and this level should not be too difficult for you to beat.