You will need to beat Level 15 in order to play this level.
As a basic ground rule, the Skater will virtually work for any of these levels. He won't be suggested so we can focus on other characters.
What are the white tiles you ask? They're Ice tiles, which speed you up for the cost of a little agility.
But now, let's focus on the Runner. The Runner won't clear the jumps as cleanly, but past the jumps nothing else proves a challenge.
You should be able to pass this level easily, barely trying, even without the Skater.