Summary  
This chapter covers managing state variables for lives and score, handling collision events to update and reset game entities, and updating the UI by printing heart emojis, the current score, and a game-over pop-up when conditions are met.

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.

We'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 our game, what happens when the rabbit touches an enemy?

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Adding Lives and Score

Awesome!

Adding Lives and Score