Not compiling properly MAC

I have just started putting my game together, and while moving between scenes is a bit jittery in the project manager, when I build the game and download it I can’t navigate between scenes at all.

I’m using the latest version on MAC Sierra

Should I quit while I’m ahead?

Do not repost please. It just makes the place spammed and that’s not great for everyone.

Sorry it was an accident
I’m still trying to work out how to use this space, it’s not very easy to navigate and I couldn’t work out if I had posted it already. I can delete it if you point me in the right direction.