This is Level 42 of Run 1.
This level has some easy and hard features. It is easy because the large platforms require less aim, but at the same time is hard because the distances between the platforms are quite long. When you are jumping, try to hold the spacebar down as long as possible to jump as far as possible. You may be able to pull off a few short jumps, but to play it safe, always jump far.
Changing gravity is not essential in this level, but will occasionally be required when there is no longer another platform in front of you. In that case, you should get close to the side you are transitioning to and then jump to switch gravity.
Overall, the only thing that will get in your way in the process of beating this level is the transitions from platform to platform. With all of this, most players would consider this a medium level.