No worries! Okay, honestly this is great. The content, flow, and ramp-up in complexity is wonderful. Please, please, please add a way to resume your learning

No worries! Okay, honestly this is great. The content, flow, and ramp-up in complexity is wonderful. Please, please, please add a way to resume your learning session without starting over from scratch. I didn't click on "Start next class" once and was booted out to the main menu. There seems to be no way to resume my "next class" without restarting the entire module. Once you have this, I'll be a paying customer.