Recommendations for game design

I want to construct a game that utilizes voice recognition. I have not started the project, so have no preconceived ideas on how it has to be done. The one core element I read up on is the EasyVR Shield 2.0 - Voice Recognition Shield.

Game details:

Single participant, standing in front of wall mounted box would select 1 of 3 categories by pressing the appropriate button.
3 random question in that category would be asked by the game. If guessed correct a light comes on, otherwise a red light flashes. Each correct answer lights up another light. If all 3 lights come on, I would like them to flash and have a servo motor open a compartment with a prize. Possibly a siren like sound file to play also

I am looking for some guidance on what hardware is needed. I know I need an Arduino board with a voice recognition shield, LEDs, a servo motor, and guess I would need an mp3 shield but not sure what else may be needed for my scenario.

Are you planning to read out the questions and do voice recognition to return the answers? That's a pretty tall order for an Arduino. It would be much easier to implement on a smartphone, tablet, laptop etc. This would also be far better for providing a nice graphical user interface display, and produce sound effects etc. If you want to control mechanical actuators (servos, solenoid latches etc) an Arduino would be sensible to do that part.

it would be a learning curve for me, but from the demos I observed it really semed doable with the EasyVR Shield 2.0 and Arduino.

The EasyVR Shield 2.0 can hold up to 32 user- defined trigger words, so if you have 3 categories, then you can only have ten questions each. Selecting a category will change the group of words that must be spoken. Since you want to use a MP3 shield, you can have an array that plays the track and holds the correct answer. If the spoken word matches the answer, then player get a point, not a match, no point. Here is a demo link HERE