The files can be downloaded here:
https://github.com/BowersIndustry/Itch. ... s/tag/v1.1
So first, download the "v1.1.zip".

Then, unzip it and replace "game.nds" in the ROM folder with your game.

Zip up all the contents of the unzipped "v1.1.zip".

Next, go to your itch.io page, and set "Kind of project" to "HTML".

Then, upload your newly zipped file using the "Upload files" button.
Then, select "This file will be played in the browser" under your file.

Next, set the "Viewport dimensions" in your itch.io project settings to 256x384.

And your done! Save and go check out your embedded game!

I hope you found this helpful, or at least cool!