Scoring for custom exercises

Hi,

I'm pretty new to Lectora and we have created a title that consists mostly of custom made exercises instead of using the build-in questions. I would like to add scoring to each of the questions. We've set it up to have a correct and incorrect tick to show students what they got right and wrong. When tested on Coursmill and you enter incorrect answer, you can actually correct the answer and move on. We do not want that. We want them to answer all question before they can move on and have each question scored. I hope I made sense. I'm not very familiar with all the technical terms yet, so if you could explain the way you would to a total and complete idiot, I would be extremely greatful.

Thanks so much in advance.

Adriana