Summary  
This chapter demonstrates implementing state management by tracking and updating player lives and score, and handling collision-driven events to reset positions and trigger a game-over UI.  

General domain of usage  
Game development

Let's add a sense of challenge and reward with lives and a score that tracks how many carrots you catch.

You're adding light gamification so players feel progress and challenge across multiple rounds, not just in a single run.

Here's what should be added.

- The player starts with 3 lives;
- Show them at the top of the screen as emojis;
- When the rabbit touches an enemy (fox, wolf, etc.), the player loses one life;
- After losing a life, reset the rabbit back to the starting position at the bottom, but don't end the game yet.

Lives system

- Only when all lives are gone, show a big "Game Over" pop-up;
- The pop-up should include a friendly message (keep it soft, not scary);
- Add two buttons: "Play Again" and "Home";
- While the pop-up is visible, the field should be paused.

Game over

- Every time the rabbit reaches the carrot at the top, add +1 point;
- After scoring, reset the rabbit to the bottom so the next round can begin;
- The score should stay visible, next to the hearts at the top.

Score system

In the game, what happens when the rabbit touches an enemy?

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Adding Lives and Score