Simulation of level created not working?

Actually i m new to Unreal engine 4 and i have been developing a sample game of Endless Runner. But i am having problem in simulating a level which i have created that is whenever i click to the simulation play button the design for level which i have created is not coming on the screen only blank screen is appearing.I have also tried many other versions of the engine but the problem is same. Please help me in solving this problem.

Your game created from this tutorials?

https://docs.unrealengine.com/latest/INT/Videos/PLZlv_N0_O1gbY4FN8pZuEPVC9PzQThNn1/

Yes i am creating from this tutorial and having that problem.