Hi April, If using the in-built or custom drag-and-drop you can set it to snap back immediately if incorrect. Or, check out this link on how to reset drag and drop after 'Submit': Storyline 360: Reset Drag-and-Drop Incorrect Choices | Articulate - Community
The site is being super slow for me at the moment, so tough to add more info or file download samples. So, for interaction ideas take a look at the E-Learning Challenges under 'Learn' at the top of this page, there are ton of inspired drag-and-drop samples, and how-to drag-and-drop accessibility.