For those who never played Boulder Dash, or haven't played it in a long time, the game is particularly uninviting. There are no instructions or key guide. Not even an indication for what the goal is.
http://mpm-kc85.de/html/C0169_Spl_07.htm vs https://en.wikipedia.org/wiki/Boulder_Dash
This is what made games so much more interesting back in the day.
Games that tell you what to do the entire time aren't more "inviting." They just want your time so you'll buy horse armor when they offer it.