That's not how this works. Only game moderators can delete their games if they wish. Also, there are many highscore based games around, all of them were accepted to the site before submission rules against highscores came in place (and they don't apply retroactively).
"That's not how this works. Only game moderators can delete their games if they wish."
After 2 weeks no, that's reserved to site staff (Fmods and Admins to be precise).
But anyway, that game was added when there were no rules about them saying it was not accepted on the site. That wouldn't be accepted if that game was submitted nowadays with our current standards for sure. Also there's runs and stuff on that board so we can't delete it like that.
If the mods agreed, maybe the leaderboard could be migrated to https://speedrun.com/gdce