Note that 'Show HN' is for original authors of the site showcasing their product. Are you the owner of vim-adventures?
Previous threads from 2013 https://news.ycombinator.com/item?id=5689971 and 2012 https://news.ycombinator.com/item?id=3877880
If nothing has changed, I dislike that it is not upfront about the paywall that comes after you've spent some time on the very basics; it would be honest to disclose that before people start.
This is how I learned vim. Money well spent.