Spot the Difference Minigame (Blood Vessels)

A game to test user knowledge of the blood vessels which cover the exterior of the heart. The user is shown two images of a heart, one of which has a major blood vessel (or vessel group) missing. The user must identify from a list of choices the missing vessel.

Success results in a congratulatory message, failure gives some kind of negative feedback.

The image to the right shows all the exterior and 3 major vessels of the heart. A 3D model with an appropriate selection of textures would work, but a 2D image might be sufficient, provided it doesn't look out of place compared to the rest of the minigames.

Asset list (assuming 3D):
 * Answer buttons
 * Display window for text
 * Heart model
 * minus_vena_cava texture
 * minus_aorta texture
 * minus_pulmonary texture
 * minus_l_coronary texture
 * minus_r_coronary texture
 * minus_great_cardiac texture
 * minus_r_ventricular texture