The game doesn't have an ending, but there is a boss that you can find after you catch 5 angelic ghosts.
About repelling GhostFace, the UI has a candle and it will go out over time and when it goes out GhostFace appears, to repel it you have to find the angelic ghosts that reset the candle count, thanks for the comment and playing the game, it's our first GameJam game so your comment helps a lot :]