I played it in the early 2000’s.
Browser game, likely flash. Hosted on a site like Armor Games or similar.
Third person perspective medieval fantasy rpg dungeon crawl.
Best specific detail I remember is the enemies were named and modeled after gems. Ie amethyst, emerald, ruby. The enemies would be re-colored and reused on each floor. Warriors spiders and such were the most prominent.
Source: https://www.reddit.com/r/oldgames/comments/us71k4/2000s_browser_rpg/