Drag and Drop variable

Hi, Bob.

Thank you for letting me know! I missed one detail: on your trigger for the Incorrect layer, since we're not using binary for the Yellow and Lunar, it looks for a blank value. Those will always be blank (as you don't have a trigger to turn them to a different value), which means this will always call for the Incorrect layer.

I made some changes to your file and turned all the variables to True\False type. I also added triggers, so the yellow lens object had to be dropped at the Yellow target. 

You will need to adjust the Results slide. Since you're not using the built-in drag and drop interaction, the user will never achieve 100%. In that case, I'd create a variable to count correct dropped objects so that you could add a score to that slide.

Let me know if this works!