I don't excatly have a clue but did you play test the game because in some of them they are saying that some library or directive is missing and that usually happens like when playtesting inside the scripts.
For example if you need the text component or any UI you have to include using unityengine.ui
I work mostly in 3D, so I may not know these.
Also I think for the unity editor if you have imported scripts or have written scripts then check in each one of them for using unity editor because using unity editor does not allow your game to be built,
Also go to the console window and then double click the error, that should tell you about what to do.
I can help in these but sorry of it wasnt helpful
Thanks