This is Level 5 of Run 1.
The big holes are look scary, right? But, this level does not require the use of the jump button, as jumping does not give sufficient height or distance to clear the gaps. Move side to side, while avoiding the holes, are and you will complete this level. However, if you think you are going to fall, you can jump to be safe, but overall, this level is still easy, but beginners may have trouble beating this level.