I feel that DHTML Lemmings deserves a mention - an implementation of Lemmings in Javascript in 2003 or 2004. At the time I saw it, my understanding of websites was basic HTML - I had no idea web technologies could be so powerful.
Here it is online, not sure if this is the original site.
<a href="https://pccc.com/downloads/junk/cool/lemmings/index.html" rel="nofollow">https://pccc.com/downloads/junk/cool/lemmings/index.html
This is before the DOM Canvas 2D API existed, so effects like digging are implemented by overlaying multiple 1px-high black GIF <img> tags over the background.
rm445 · · focus · HN ↗
Here it is online, not sure if this is the original site. <a href="https://pccc.com/downloads/junk/cool/lemmings/index.html" rel="nofollow">https://pccc.com/downloads/junk/cool/lemmings/index.html
jaen · · focus · HN ↗
This is before the DOM Canvas 2D API existed, so effects like digging are implemented by overlaying multiple 1px-high black GIF <img> tags over the background.