The sprite header pane containing the rotation style buttons.
Due to the default rotation style, sprites rotating will appear upside-down. You can change the rotation style using the buttons near the top of the middle pane of the screen. "Left-right" is most likely the best for this.
The block in 2.0 (Motion) that replaces the rotation style buttons.

There is also a block to change the rotation style dynamically: Set Rotation Style ().