Keep going with your Christmas mysteries.
Remember to try to include the following:
- transitions from slide to slide that make the user feel like they are moving (or use the curtain transition to reveal things)
- animations when you click on things
- good background pictures to make your slides look like the rooms they describe
Don't forget to set your slideshow up to 'View at a kiosk' - that way, you can't click on the background and move the presentation on.
You really need to think about your story's plot now... what is actually happening in the story?