Run and just Run without attacking walls.
Swipe up is jump, and swipe down is slide.
Swipe right is turn to the right.
Swipe left is turn to the left.
You have 3 lives for start.
When you get all black diamonds, then stage is clear.
When you get the purple diamond, then you get one extra life.
If you clear stage 3 before you lose your lives, then you win.