Mouse disappears when clicking the blank area of the opening UI in Multiplayer Shootout game

If the user clicks in the black area off to the side the mouse will be captured and the player can no longer get the mouse back

1. Download multiplayer shootout
2. Package the game for windows 64 bit
3. Open the packaged game
4. Click way off to the right in the black area of the screen
5. Notice that the mouse is captured and that the user can not regain mouse control