There are quite a number of crumbling tiles in the level, and they can be a threat if not handled carefully.
There are quite a number of crumbling tiles in the level, and most of them connect to each other. If you step on one of them, all connected crumbling tiles will dislodge. There'll be a short time that you can still jump from any of them to save yourself.
If you happen to dislodge any tiles, stray away from the holes they left, and continue running on the normal tiles.
Fortunately, this is only an introductory level for the players to meet such large patches of crumbling tiles. In later levels, you won't be so lucky and have adequate space for you to escape from these grey tiles. Hence, you will have to hone your skills to catch up with the increasing difficulty of the levels if you can't beat this level easily.
Tip: If there is only a small gap in front of you, you don't have to jump. The momentum created by the Runner can let her go past the small gap without a problem. If the gap is larger, you will have to jump.
There are no achievements relating to this level. yet due to the fact that this level has a great deal of crumbling tiles, this is quite a suitable level to earn the achievement "Galactic Vandalism", though not as preferred as ridiculous levels like Level 10.
If you want to have this achievement done, repeat this level again and again, while destroying all crumbling tiles in this level. In this way, you will have many crumbling tiles to crumble and you will earn this fast.
This is the easiest achievement in the game. Even the beginners can earn this without much trouble. Intentionally or unintentionally.