The reason the eggplant is not showing up is that it's touching the spatula, which causes it to disappear. When you first run the program, the mouse is off the game area, so when the computer gets its x and y coordinates, it makes them both 0. That means that the spatula is located at (0,0) and touches the eggplant, causing it to disappear as soon as the game starts.
Update: I just talked to someone one the Game Lab team, and they are looking at a fix that would make the default x and y of the mouse be a different number that is further off the screen. This would fix the problem moving forward.