Instructions
Visit the website Nitro.fi5.us. At the top right hand corner of the page there will be a search bar. Type in "Angry Birds" and hit enter. This will direct you to the Angry Birds page.
Read through the list of system requirements to make sure your computer can handle running Angry Birds. If it can, click the download link found directly below the requirements.
Download Angry Birds onto your computer. Once the file finishes downloading you will need to extract it. On most computers this can be done by double clicking the file.
Wait for the file to finish extracting. A folder should appear on your desktop. Double click the folder to open it. There will be a file inside it called "AngryBird.exe." Click on this to install and play the game.
Play Angry Birds the same way you would play it on a cell phone. The controls are the same with the exception of the zoom. Instead of touching your computer monitor to scroll in and out, simply scroll your mouse cursor up and down to zoom.