Good Concept but...
The concept is very good but...
Here's how the game basically plays:
You click a card, and you hear a note...
You click another card and if you miss it you hear a dull note, and then the note that you selected...
What you should have done is
on the second guess, let it give the note, and then have the "incorrect note" as the cards close up...
It will confuse the players less and still show that you are wrong...
Admittedly at first i thought the wrong sound was the note that that note actually was... threw me off just slightly