I made it a little while ago, so I can't quite remember the details...
I'm pretty sure there's a game mode like that.
You should be able to select it from the title screen.
So there is an issue... whenever i open the title screen, no menu shows up on the green screen and it closes into the tutorial page instantly. There is also some other things i have realized are different than the video, such as the text on the first screen that says press Z not showing up, and also i am not the only person i have seen have this "bug", as i have seen other peoples videos on this game with those exact differences. Is there a newer version of the game than 1.2? because this feels more like I'm missing an update than a bug that would normally happen, and so commonly at that. Sorry for the long reply, I'm just wondering...