The cleaner and more optimized you can make your code, the better, but I understand this is an Intro course and it takes time to develop good coding habits. I will be looking for consistency in your code and a logical structure more than performance optimization. This is a small web page, it wouldn't benefit much from performance optimization anyway.
I have included citations of where the images came from in the zip file. Include these citations in your page comments, they are under the creative commons, but the license requires you cite where they came from.
Link the final exam from your portfolio website when you are done so I can grade it.