Thanks for the feedback.

The assets that are compiled into the binary are the css, js and some svgs.

I generally avoid static assets like pngs. They are bloated, tend to only work well on certain device resolutions, etc. Plus, they tend to go out of date and need to be updated (like when changing UI and a screenshot is no longer accurate).

As for the overall design, I tried to keep it simple and monochromatic but I can see how it's pretty dreary. I think a single accent color may improve the overall look and feel.