Without user input, once activated, Chainlife NFTs are 0-player games. With user interaction, they're 1-player games. Depending on definitions, it could be argued that they're also 2-player games. But anyway, here's how you interact with them.
Step 1: click on one or press SPACE.
Step 2: ...Well, that's up to you, check out all the various hotkeys and have fun!