Speed hikers are racing on the mountain. But running is not fast enough, hikers have to fly!
All of the magic is GRAVITY.The gravity increases when screen is touched, and it restores to normal when released.
The game rule is very simple, but how fast hikers run will completey depend on your skill.

Some tips may be helpful:
# Touch to acclerate speed on declivity.
# Release to make hikers fly on acclivity.
# Fine tuning gravity when hikers are flying.
# BOOST is very helpful when you fall behind.

Good luck of your trip!