This is Level 25 of Run 1.
This level has many small platforms and is harder than the last few levels. Though the platforms seem frequent and close together, they really aren't. Often times you will think you can reach the platform you're jumping to, but end up coming a bit short. To avoid this from happening, experiment with as many routes as you can. By doing this, you can know which jumps you can reach and which ones you can't.
If you know you can't reach the next platform in front of you, catch onto a wall. Whenever you can't reach the one if front of you, there should always be an alternative route.
Some platforms are snake-shaped, so when on one of these platforms, just run along it to the very end before jumping.