Throughout the game you get different words, play through it until it says... ' Make the final call ' .. at the top left corner of the game.

To get the 'Bad Ending', you combine anything randomly, and it'll tell you to try again where you'll have to play through the game to get to the point where it lets you make a call again.

To get to the 'Good Ending' you'll have to combine both 'Come out' and 'midnight'.

Essentially, that's the end of the game, it'll show you a few of the words related in the game as pictures shortly after.

:D