I put together a site called portalDoge to help people get into cryptocurrency, and Dogecoin specifically.
When I first started out I found that you could get free Dogecoin from fountains and thought, "That would be a great way to draw people to games, too! When I looked around I found that most games were gambling games, and I didn't want to do that so I made a quick game called "To The Moon" for people to play.
Here it is: http://portaldoge.com
I know the game is pretty crappy, but I hope to add more that are better quality now that I have a proof of concept working.