This is Wind Fortress, an endgame challenge run unlocked in Cave Story +
In order to achieve S Rank, you must clear it in under 2 minutes.
I REALLY adore Cave Story. This is my first time experiencing the end game content. I hope this helps you get an idea of how to clear it for yourself!
(Thumbnail Art vectored by NYAssassin)
![](https://s2.save4k.ru/pic/AY8dUfEBcBo/mqdefault.jpg)