Hi James!
I tried my sample course in Scorm Cloud and just clicked the arrow at the beginning. I navigated through the entire Microlearning course by using the scroll wheel of my mouse. You'll see in this short screen recording (no audio) that it is still registered as "Complete" in Scorm Cloud.
Does your LMS open the course in a separate window or on a new tab? You can also enable the debug mode on your course to see a side-by-side communication sent from the course to your LMS.
Feel free to open a support case here if you continue to encounter issues with the completion of your Microlearning course.