sure! I figured anyone who played it would remember it for the ievan polkka remix before anything else, but I remember lots of other stuff about it:
- it was pretty old (predates the forum crash, so it must have been before 2009; I know this because I distinctly remember making a post complaining about the music and it's not in my post history), but it was still many months after the game's release
- it was built around going back and forth across a horizontal line of rooms; no vertical room changes. You'd go to the right, then reach the "end" and get a powerup, and a shift would "replace" all the rooms with copies that had more enemies (but mostly identical layouts and visuals); then you had to go all the way to the left to get the next powerup, then right again, etc. until the end.
- I'm pretty sure it was in the Very Hard category. The later rooms had ridiculous numbers of meanies.