Drag and Drop

We're going to make sprites draggable, and make a simple matching game. Making sprites draggable is also useful in many other projects.
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1) Make two copies of a sprite. Make sure to give them different names. Move the target sprite to a corner.
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2) To make the other sprite draggable, we're going to start off by making it follow the mouse all the time (similar to Squid Chase).
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3) Make the moving sprite only start following your mouse when you click on it.
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4) Make the moving sprite stop following your mouse when you are no longer holding down your mouse button.
Hint: There are multiple ways of accomplishing this. You can try using a new looping construct, or have a variable that keeps track of if you are dragging the sprite.
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5) Repeat steps 1-4 for each pair of sprites you'd like in your matching game.
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6) When all of your pairs match, tell the player they won the game!
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7) (Bonus) Make offsets to prevent the sprites from snapping to the mouse when you click them.
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