What types of interactivity make the game fun and challenging? How is feedback presented in the game?

Describe the “play” elements and interactive features of the game.
Guiding questions include: How does the player play the game?

What interactive elements are present for players?

What do players do players do to interact with the game (the mechanics they use, the rules they follow, the interface elements and so on)?

What types of interactivity make the game fun and challenging? How is feedback presented in the game?