What is your core game loop(s) and what makes them fun?
Now, what platforms will players access some or all of your game loops from?
Gestalt allows a game loop to be interacted with by one or more players from one more more devices.
A device can be as simple as a flashing light (feedback) and a button (input) or as complex as a keyboard/mouse/vr experience (high density input of keys, mouse position, head position, visual focus, and multi-sensory output).
Both methods can submit input and receive output from the same gestalt system.