Summary
Highlights
Begin by creating a new folder for your game, then create a zip file within it. This zip file will be the one uploaded to Newgrounds.
Go to the Scratch website, navigate to your game, and find the embed code. Copy this code for later use.
Create a new text document, paste the embed code into it, and save the file as 'index.html'. This file will house your game within the Newgrounds platform.
Move both the original text document (if you saved it) and the newly created 'index.html' file into your game's main folder. This keeps everything together for the upload.
Go to Newgrounds, click 'Upload', and select your game's folder. Configure the frame size for your game; a recommended size is 494 by 415 pixels, though this may vary depending on your game.
After configuring the settings, proceed to publish your project on Newgrounds.