That was a very pleasant little experience! Controls well and not too difficult. The music is nice and the theme usage was perfect.
My only critiques are with the flashlight. The light comes out and turns off awkwardly slow and didn't really feel like I was using a flashlight to fight the ghosts. And have you considered letting the mouse control exactly which direction the light shines instead of just going with the player's direction? Either that or using a keyboard button instead of a mouse click to activate. The click just makes it feel like the mouse position should have more influence.
The ghost of Christmas' future's projectile is LOUD. I never had to wonder if there was one of them or where they were.
Well done on this, though! Especially for only 13 hours of dev time! This is really commendable work for the time you had.