First, spin this wheel to find out which genre to use. If you already have a genre in mind, go to the activity.
This is where you need some creativity. Go to this random noun generator, and try to link up the noun to your game genre. Here's the link: randomwordgenerator.com
Now it's time for you to fill in the rest of the pieces for your game! This is how I come up with ideas, so I decided to share it. I hope this was helpful!