diff --git a/lib/bowling_game.dart b/lib/bowling_game.dart
index 838360e..a900cb8 100644
--- a/lib/bowling_game.dart
+++ b/lib/bowling_game.dart
@@ -1,9 +1,7 @@
 class BowlingGame {
-  void roll(int pins) {
-    throw UnimplementedError();
-  }
-  
+  void roll(int pins) {}
+
   int score() {
-    throw UnimplementedError();
+    return 0;
   }
-}
\ No newline at end of file
+}