HTML is a web language used to descibe web pages. With the help of CSS (for text styling, like fonts), it builds almost every web page you've ever visited, including this one. JS (or JavaScript) is a programming language meant to work with HTML and CSS.
I made a google chrome dino game clone at summer camp once, but they never sent me the file, so i can't show it here. I recentally got interested in bookmarklets, which are pieces of JS code that you can run by simply clicking on a bookmark. For example, here's one that says "hello":
I'm still learning about this, and i don't know what else i'll make, but Blooket and Gimkit hacks, which are bookmarklets, are interesting to me. QQQQQ