The game was a soccer match. The protagonist of the story, Jim, felt that it was too soon to play the game because he and his friends had just finished eating a large Christmas dinner and he was feeling quite full.

Short Answer:

What was the game?
- The game was a soccer match.

Why did he feel that it was too soon?
- He felt that it was too soon because he and his friends had just finished eating a large Christmas dinner and he was feeling quite full.

Long Answer:

Explanation of the story 'The Best Christmas Present in the World':
- 'The Best Christmas Present in the World' is a short story by Michael Morpurgo about a man named Jim who finds a letter from a soldier named Jim Macpherson who fought in World War I.

Summary of the story:
- Jim finds a letter from a soldier named Jim Macpherson who fought in World War I.
- The letter describes a Christmas truce between the British and German soldiers.
- Jim decides to find Jim Macpherson's family and return the letter to them.
- He discovers that the soldier's granddaughter is still alive.
- She tells him the story of how her grandfather wrote the letter and gives him a Christmas present - a soccer ball that was used in the Christmas truce soccer match.

Explanation of the game:
- The game was a soccer match that took place during the Christmas truce between the British and German soldiers in World War I.
- The soldiers put aside their weapons and played a friendly game of soccer instead.

Why did Jim feel that it was too soon?
- Jim and his friends had just finished eating a large Christmas dinner.
- Jim was feeling quite full and didn't think he could play soccer without feeling sick.
- He also didn't want to spoil the game for his friends by feeling uncomfortable or not playing well.

Conclusion:
- In 'The Best Christmas Present in the World', the game was a soccer match played during the Christmas truce between the British and German soldiers in World War I.
- Jim felt that it was too soon to play the game because he had just finished eating a large Christmas dinner and didn't want to feel sick or spoil the game for his friends.

Football was the game