Of course, I know you didn't mean to dampen the vibe. I really love the site and the love idea as it got my brain thinking which is why I was really bummed to see a forced login. Obviously you want to track progress, difficulty, and customize per user which is understandable and smart. I could be an outlier to the enlist statement/requirement so please grab other data points on this subject ;)

Keep up the good work on it!