What is the Sky Glider game, how does it work?

According to the introduction of Orangenose Studio, Sky Glider is a Arcade game on the Android platform. There is currently a 1.0 version released on May 22, 2015, you can see the details below.

From the developers of Hardest Game Ever 2
comes a smooth yet thrilling journey that millions will enjoy — Sky Glider!
Glide through challenging skies, and reach the farthest distance to unlock new levels.
Be in awe of the surreal worlds to discover!
Just tap and hold to fly, then release to descend.
Sounds easy, right?