diff --git a/app.py b/app.py
index e69de29..386097a 100644
--- a/app.py
+++ b/app.py
@@ -0,0 +1,60 @@
+import random
+
+def is_valid_choice(choice, options):
+    """Check if a choice is valid based on the available options."""
+    return choice in options
+
+def is_winning_choice(choice, opponent_choice):
+    """Check if a choice beats another choice."""
+    if (choice == "rock" and opponent_choice == "scissors") or \
+       (choice == "paper" and opponent_choice == "rock") or \
+       (choice == "scissors" and opponent_choice == "paper"):
+        return True
+    return False
+
+def main():
+    """Main game loop."""
+    player_score = 0
+    computer_score = 0
+    options = ["rock", "paper", "scissors"]
+
+    while True:
+        # Get player's choice
+        player_choice = input("Enter your choice (rock, paper, scissors): ").lower()
+
+        # Validate player's choice
+        if not is_valid_choice(player_choice, options):
+            print("Invalid choice. Please try again.")
+            continue
+
+        # Get computer's choice
+        computer_choice = random.choice(options)
+
+        # Display choices
+        print(f"Player chose {player_choice} and computer chose {computer_choice}.")
+
+        # Determine the winner
+        if player_choice == computer_choice:
+            print("It's a tie!")
+        elif is_winning_choice(player_choice, computer_choice):
+            print("Player wins!")
+            player_score += 1
+        else:
+            print("Computer wins!")
+            computer_score += 1
+
+        # Display scores
+        print(f"Player score: {player_score} | Computer score: {computer_score}")
+
+        # Ask if the player wants to play again
+        play_again = input("Do you want to play again? (yes/no) ").lower()
+
+        # Exit the game loop if the player doesn't want to play again
+        if play_again != "yes":
+            break
+
+    # Display final scores
+    print(f"Player score: {player_score} | Computer score: {computer_score}")
+
+if __name__ == "__main__":
+    main()
\ No newline at end of file