anyway to rotate the NO$GBA window?

downloaded Rhythm Heaven and started it up by the game is meant to be played with the DS sideways. Is there anyway to rotate the window?

You need to find and download the no$gba 2.6x addon. It lets you rotate the screen, and gives you 2x size increase.

The 2xgpl or whatever addon on ngemu forums does the same (because 2.6x is based off that).