💡 ISSUE 3 – Add a new design pattern (Strategy or Observer)

[nalama1]

Title:
💡 Proposal: Add a new design pattern (Strategy or Observer)

Description:
The project currently demonstrates the Factory Method pattern. Let’s add another pattern to extend the educational scope of this repository.

Suggested Options:

• Strategy Pattern (to change game behaviors dynamically).
• Observer Pattern (to handle notifications between objects).

Reason:
This would evolve the repository into a broader collection of design patterns implemented in Python.