I think it's perfect for the target audience. Most of them, if not all of them, were for designer positions. This demonstrates their skillset for design, especially if the job is for advertising creative work.

If it's for creating functional user interfaces, maybe not as great, but I think it still achieves the overall goal of demonstrating their skillset for design work.

True, but if I were any of them I'd just give a more readable version along with the incredibly creative one.