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The game tracks two values: the current score (puntaje) and the session high score (puntajeAlto). Both are integers initialized to 0 at startup. 
puntaje = 0
puntajeAlto = 0

Score

Increases by 10 each time the snake eats food. Resets to 0 on wall collision or self-collision. Displayed live on screen.

High score

Updated to match puntaje whenever puntaje exceeds it. Never resets during the session — only a new game run starts it from 0.

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Earning points

A point event fires when serpiente.distance(comida) < 20. The score increments by 10: 
if serpiente.distance(comida) < 20:
    # ... spawn new food and body segment ...
    puntaje += 10
    if puntaje > puntajeAlto:
        puntajeAlto = puntaje

​
Score display

The texto turtle renders both values as a single line at position (0, -260). Before each write, texto.clear() removes the previous text: 
texto.write(
    f"Puntaje: {puntaje}\tPuntaje más alto: {puntajeAlto}",
    align="center",
    font=("verdana", 12, "normal")
)

​
When the display updates

There are three distinct cases where texto.clear() followed by texto.write() is called:

Food eaten — new high score

When puntaje exceeds puntajeAlto, the high score is updated and the display refreshes:
puntaje += 10
if puntaje > puntajeAlto:
    puntajeAlto = puntaje
    texto.clear()
    texto.write(f"Puntaje: {puntaje}\tPuntaje más alto: {puntajeAlto}",
    align="center",
    font=("verdana", 12, "normal"))
When puntaje is still below puntajeAlto, the score still goes up and the display refreshes to show the new current score:
if puntaje < puntajeAlto:
    texto.clear()
    texto.write(f"Puntaje: {puntaje}\tPuntaje más alto: {puntajeAlto}",
    align="center",
    font=("verdana", 12, "normal"))
On either type of collision, puntaje resets to 0 and the display updates. puntajeAlto is left unchanged:
puntaje = 0
texto.clear()
texto.write(f"Puntaje: {puntaje}\tPuntaje más alto: {puntajeAlto}",
align="center",
font=("verdana", 12, "normal"))
The high score is stored in memory only. Closing the game window or restarting the script resets puntajeAlto to 0. There is no file or database persistence between runs.

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