i recently belatedly rated a game based on my experience of an earlier form of it and then realized the game has changed significantly since then, so i wanted to remove the rating, but i don't see an option for that. Is this possible? If not, I would appreciate if it were made possible. Thanks!

No way to remove a rating right now (that's a big oversight), you can however update your rating if you get the chance. I'll see about adding a remove button when we next update our ratings system. Thanks