Any thought about adding a score attack category for 250k? 500k? I find that score/time runs are a lot more interesting than stages, given the repetition in the game. Plus, 10 stages is too easy to win.

Generally, this is exactly the same kind of question, which was asked in Donkey Kong Jr forum, so I will just redirect you there, what I think about it personally: https://www.speedrun.com/dkjr/thread/8xmxy . To conclude that, I'm not fan of it, but I see reason, why it could appear as additional category, but even if it appears at some point, then rather not long goal as 250k or 500k. This is more of arcade than NES approach to have huge arbitrary score attacks and it's just nature of this game, that it's short.