Unless the reader clicks the link to your story page, there's almost nothing about you personally or specific details about you as a working professional. It could just be that the "About Yitong" blurb at the bottom is kind of generic blah blah "design is amazing" stuff (sorry). If you're actively looking to get hired for projects, I think that text should be something more like "get in touch if you X, Y, or Z; I work remotely or on-site in SF; I can do A, B, and C" or whatever, something that clarifies your situation and availability.
I tried to let my work speak for itself by keeping the visual flourish to a minimum. I learned a lot about using white space and typography to enhance a fairly minimal design.
Because there is nothing for people to try out or play with, the portfolio is not really in keeping with the big idea of Show HN.
Given the quality of the presentation, there's a possibility that a blog post about the design process would be an interesting read and worth submitting.
Good luck.
Can't say I've solved many strictly technical problems outside of some quick Python scripts to analyze board game endgames.