Importing images, video, and audio into Twine games can enhance the experience. Images can be added through HTML or Twine-specific syntax. Video is possible but was not part of the group's current plans. Audio can be added with HTML embedding code that specifies attributes like the file source, whether it autoplays, loops, and is hidden or visible. The background color was changed to red through a style sheet passage tagged as such, using CSS code. Font colors were also adjusted with CSS color codes.