Is it possible for learner to drag and drop an icon on any target?

Hello everyone,

I am developing an interaction that requires the user to select an icon out of a selection of ten and drop it in a 5x5 grid. The interaction does not need to be graded, but I do want a learner to be able to drag one icon into any of the 25 rectangles. In setting it up, I created hotspots for each rectangle (since my grid is a single image) and then listed all 25 as Drop Targets in the Form View.

Now I'm confused about how to allow any of the 10 icons to be a possible Drag Item.

You can see the Slide View and the Form view in photos below:

Any help would be much appreciated!

Thanks,