In this level, there are quite a number of large, long gaping holes. Be sure not to fall into them. You can use long, high jumps to jump over them, or you can jump between the narrow platforms between the holes.
This level is considerably more difficult than Level 7, and beginners may need to try a few more times before beating it.
Since the crumbling tiles are all in the gaping holes, they should not be a big problem. If you don't fall into a hole, I am pretty sure you won't land on to one of these crumbling tiles. If you do, then I am sure that these tiles saved you life.