You are the black square and have to jump across the gaps between the black rectangles by tapping the screen. How many gaps will you pass? If you're good enough, you can become one of the world's leaders.
You failed too early? That's not a problem - Each run you can start over from the last Brick you landed on once. Feel free to use the second try you've been given.
Still to hard? Not a problem either - Just get yourself a double jump for free in store. It will be available for your entire next run!
I'm sure you can do it, you'll just have to try.