Prolobe Online Absolute Pitch Ear Training

Hey I just recently thought of an idea for a game to help develop one's absolute pitch abilities. I am sorry to waste your time if this game already exists, but I have yet to find it.

Please review my idea and look for flaws, etc. I have no capability of producing such a program, but would love to see someone else help create my idea.

The game is there will eggs on a screen, less eggs (maybe two) for the easiest mode, more eggs (12 or more) for harder modes.
Every egg will look the same, however, when you hover your mouse over an egg, a note is played.

The objective is to find the note "x". Example: The game would have two eggs on board, and there would be text on the screen saying
"Which egg is Ab?"
You have to figure out which one is Ab, based on your idea of Ab, and by comparing all of your options on the board.

When you click on an egg, it will be highlighted, and you will have to hit the "finish" button to check your answer. The game will then say;

"You answered... *the tone you picked*.. -Pause- Correct answer... *correct tone*."

Comments, concerns?

Thanks for reading!