Scratch Game Ideas

Learning to use the Scratch program has been a little challenging, but I think after completing the tutorial and Scratch cards I am starting to get the hang of it.  Here is the animation I created for the tutorial, and here is the animation I created using the Scratch cards.

My idea for my Scratch game is to use the Whack-A-Mole game I found here and edit it to create a math game for students.  I want the math problems to appear at the top of the screen, and a series of choices will appear out of the holes, and the player must "whack" the correct answer.  I would also like to change some of the graphics, and add sound effects.