Dreams involving ghosts often represent unresolved feelings, fears, or aspects of yourself that you may be trying to confront. In your dream, the setting of a school and a basement may symbolize a place of learning and introspection, suggesting that you are exploring deeper emotions or past experiences.

The presence of a ghost could signify something from your past that you haven't fully dealt with, and the fact that it is tied to a game might indicate that you feel like life is a series of challenges or tests. The character of Leo, who tricks you and plays the piano, could represent a friend or a part of yourself that brings humor or mischief to a serious situation, highlighting the contrast between fear and fun.

Being "sucked into the ghost world" suggests that you may feel overwhelmed by these unresolved issues or fears. The quest to figure out who killed the ghost can symbolize your desire to uncover the truth behind these feelings, or it might reflect a need to resolve a conflict or mystery in your life.

Consider what aspects of your life might feel unresolved or what fears you may be facing. Exploring these feelings could lead to personal growth and understanding. It might also help to talk about your experiences with friends or reflect on what the characters in your dream represent to you.