The Pulsar79 images are actually png's with a hidden zip file! The zip contains the native game clients for Linux, Windows and Mac OSX. We then use authentication in our game client to authenticate the ownership of the token. Each game is signed with its individual token. This means that you will need to own at least token '79' in your wallet to play the game client for that token.
Once you have your token, you can download the game by going to your token on OpenSea, fullscreen the image, right-click and save-as the image. This will result in a file of about 90/100 MB. Depending on your operating system use one of these extracting methods:
Windows: Open the image with 7Zip, Winrar or similar and extract, renaming to zip can help but should not be required
Mac OSX or Linux: run 'unzip 79.png' in terminal (without quotes) in the correct folder (79 being subsituted with your own token).
For additional help please join the Discord and check the #Support channel!