To enter your game so that it can be rated, please follow these instructions in creating a page on itch.io for your game:
1. Set 'Kind of Project' to Downloadable
2. Select 'Add External File' (it's to the right of the 'Upload File' and 'Choose From Dropbox' buttons)
3. Change type from Executable to Source Code.
4. Copy and paste the MYSHMUP URL for the game into the 'http://' section.
The 'Download' button on your new itch page will now take players directly to your browser playable MYSHMUP game!