Updated and tweaked some minor details. First, the text on the in-game "Menu" button has been changed to "Back to Menu," in response to @schmavery's feedback. Second, coin rotation has been randomized. To do this, the rotation has been moved from an animation to a dedicated "Rotate" script. Finally, the ship's pivot has been moved from the bottom to the center. This makes the arrows center properly and reduces jitter at high rotation velocities. No other changes.