Played in RetroArch with RetroAchieements enabled:
retroachieveme...
Nerves got to me around stage 25 or so when I realized what kind of pace I was on - this beats the current WR on KZfaq, but I lost all my extra lives before beating the game. Each remaining extra life at the end of the game is worth 10,000 points. If I managed to not die at all in this run, score would be around 1.65 million. -_-
Also, if anyone beats my score or I overlooked another recorded run of this game that bets my score, lemme know and I'll remove the WR claim from video title. lol
I am 100% sure people have gotten higher scores over the years than this, but it is currently, afaik, the highest documented score.