To design a casino website with a hero image and game previews, follow these steps: First, create a hero image that represents your casino brand, which can be done using graphic design software like Canva. Ensure the image is sized correctly for full-width display on your website. Next, create preview images for each game offered on your casino. These images should be 200x300 pixels with rounded edges for a polished look. Place these images under the hero image on your homepage. You can also add game titles and stylize the previews to make them more attractive. Once your images are ready, incorporate them into your website's HTML structure, ensuring they link to the individual game pages.