It's nice and simple :) you can easily build mobile games with it or VR-Games (a friend of mine is working on one atm).
unity3d.com/learn/tutorials/topics/mobile-touch/m…
for endless runners:
answers.unity3d.com/questions/491411/best-practic…
there is a cool g+ community for it :)
you could use unreal as well: docs.unrealengine.com/latest/INT/Platforms/Mobile