As a new user, one thing that's somewhat confused me are the brick levels.
While more frequent users of the website may be able to easily remember what
color corresponds to what tier (as seen at https://www.bricklink.com/help.asp?helpID=54),
new users will likely not.
My suggestion is to add an on hover to brick images which contains the numerical
tier of the brick, similar to what I did here: https://imgur.com/a/NJ0FCDg using
inspect element. Doing such wouldn't be difficult, as all it involves is
adding a `title="Number here"` to the img element that displays the brick.