Add comments for areas of improvement to textslot

PyGame/practice/textslot.py

@@ -125,10 +125,15 @@ def roll(balance) -> int:
     else:
         balance -= bet * lines
     print(f"Your balance is now: ${balance}")
+    # Should be returning "balance"
+    # "winnings - total_bet" is not at all correct
     return winnings - total_bet
 
+# main() does not return a value so should not be type hinted
 def main() -> int:
     balance = deposit()
+    # Using "while True" requires a break to exit.
+    # Should instead be a conditional that tracks the actual exit conditions
     while True:
         print(f"Current Balance is ${balance}")
         answer = input("Press enter to play (q to quit).")