Return state to normal on a Drag & Drop question

Hi Ashley,

I attached the .story file here, so you can see exactly what i am trying to do. In fact, I did not create a submitt button and neather use the submitt button of the player. As soon as the user placed the letters on the rigth gaps, the layer "Exercício completo" (completed excercise) will show up to them. they don't need to click on any button. Could you see what I did wrong, or how I can fix this problem.

Please, if you think the only way is including a button for submitting so let me know how I do to states hold on until submit interaction.

Thank you so much,