I've just created a leaderboard for the original game -> Ninja Princess! right now it's just one SG-1000 run but it's open for the arcade version.

What's the difference?

• different levels layout, there are 2 level with a wall climbing
• no speed scroll, enemies need to be killed and cannot be out run
• Enemy's shurikens are bigger, a bit harder to avoid but easier to counter

It's a fun game to learn, it took me maybe 4-5 hours to get a run. I've also post a rom hack to help with practice

https://www.speedrun.com/Ninja_Princess