There was a day where I cracked out hardcore on that Winterbells game a friend showed me. You can actually break the highscore on it so that when you finally lose your score displayed is less than what it was. I was pretty upset, the two of us were duking it out with SSs of our highscores, and my best didn't display properly once I had a pretty godly score.
...can't seem to find those images. Oh well.
Also I'm not too familiar with any other browser games, to be honest.