First of all, take one look at the picture. What do you notice? The rest of the level is like that. Normal tiles, crumbling tiles, normal, crumbling. So using the Child, you don't even have to move and you will instantly beat the level. If you don't have the Child, use the Runner.
If you are using the Runner, try to avoid the crumbling tiles. If one of them dislodges, the rest will as well, increasing the difficulty of the level quickly.
The Bunny is also good because it can go to the corner and hop from side to side. This will take some judgement, as you may need to decide whether to jump forward or to the side. As an emergency save, do a high jump.