Create PPT business presentation with basic animation

I need to do a business presentation in a week and need help to create the PPT slides. It will involve a couple of slides with basic text, but most of the presentation will be me telling a story about a future vision of the organisation. Each time I click the mouse, I want another bit of a picture to be built. The 2D picture will be building the wall/front of a castle one brick at a time. Each brick will be labeled with a couple of words and a different part of my story. Maybe 10-12 bricks in total, plus 3 towers/turrets that are at the top of the castle (also labeled). Once the castle is fully built, the next click will make the screen go dark as in night time but with the castle still visible, and there will be a bunch of stars in the sky. The next click after this will signify the next day, stars disappear, sky turns blue, and I want an animated flower to grow out of the ground in front of the castle (e.g. a sunflower). That will conclude the presentation. Freelancer must be good communicator, able to commence immediately and able to deliver in the less than 1 week timeframe.