I was inside a video game about removing ghosts from haunted house. But I was just screaming and having fun.
Dreams about video games often symbolize a desire for escapism and having fun in a fantasy world. The fact that you were removing ghosts from a haunted house may suggest that you are trying to overcome some fears or insecurities in your waking life. However, the fact that you were simply screaming and having fun may indicate that you are avoiding dealing with those fears and instead choosing to ignore them. It's possible that this dream is encouraging you to face your fears in a more productive way in your waking life.