diff --git a/buggy.py b/buggy.py
--- a/buggy.py
+++ b/buggy.py
@@ -6,7 +6,7 @@
         self.y = 0
 
     def rotate(self) -> None:
-        self.dx, self.dy = self.y, -self.dx
+        self.dx, self.dy = self.dy, -self.dx
 
     def move(self) -> None:
         self.x += self.dx
