Pong Game menu problem

Hello again,
so my latest bugs have being fixed,
but i’m having a new issue my game works perfect when i press play in unreal engine and i use the ingame simulator,now i made it in to a build and for some reason my menu isn’t working it shows the menu but when i click the starting buttons the levels wont open they just stay in the menu
the game is a pong game build in UE 4.6.1
please have a look at it and what i did wrong i would be much obliged,some people said it might actually be a UE bug

Project: https://drive.google.com/open?id=0B2L7Oa7L8P0HUnBEekIyeWUwYnM

thank you