Yes, you can mount your GooDee projector upside down from the ceiling using a ceiling mount bracket. Most projectors, including the GooDee projectors, have a ceiling mount option that allows for upside-down installation. You can purchase a compatible ceiling mount bracket and attach it securely to the ceiling, then attach the projector to the bracket using the appropriate screws and attachments. Once mounted, you can adjust the projector settings to flip the image upside down, so it appears right side up on the screen.