itch.io

Solution if you are on Mac: 

1. Open the "Terminal" application.  Enter the following text and press enter:

python -m http.server

2. Open your browser and go to:

http://localhost:8000/

You'll see your files and folders... click through to where your Dragonsweeper folder is that you unzipped. Click on index.html -- you should be able to play the game. It'll be the older version with the two orbs start.