To download "Burger Island," as of November 2015, navigate to the website GameFools.com, and search for "Burger Island" in the search box. Beside the "Burger Island" result that comes up, click on the PC Game button link. Then, click either Play Now or Buy Now.
Clicking Play Now allows you to download a free trial version of "Burger Island." After clicking the button you are prompted to enter a valid e-mail address. After doing this, you can click Begin Download to begin your download of a trial version of "Burger Island."
Clicking Buy Now takes you to a page where you can enter the required details to purchase a full version of "Burger Island." The current price of the full version is $9.99 USD.