making a hidden object game with html5/jquery?
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I'm currently trying to make a hidden object game (where's waldo/wally type of game) and was originally thinking of using HTML5/Jquery, but not so sure it would be the best way to go about doing this. 

What I was thinking of doing is having a star chart and tasking users to find specific zodiac's where they click the stars and once they find the right ones it changes to finding a different zodiac. My plan was to have the basic star map as a background, and use jquery to register mouseclicks and just compare a radius around the pixel hit to see if it is one of the right stars. 

The problem I'm having planing wise is how to indicate to the user they clicked a right object? Only way I can think of is having many images, each one with 1 of the stars marked/coloured in and the rest of it transparent and just to put it on top of the background starchart image. This just seems terrible inefficient though if working with 10+ images.  

I'm also not sure working with the pixel position would work with re sizing the image/screen? 