Editing a drag and drop quiz

I want to make a drag and drop interface, but with one important difference from what the regular component says. I want to be able to make it so that when you drag one of the movie clips, it only lets you snap it to the correct target, otherwise it snaps back to start. Normally, you can drag one of the clips and have it snap to the incorrect target. Is it possible to change that?

Also, is it possible to make it so that as soon as all of the clips are in the correct position, it automatically goes to a certain frame, without clicking on the “check answer” button?

Thanks for the help.