I’m glad you didn’t, completely on topic for this thread. I’m sure you’re speaking for an awful lot of people on HN, possibly a large majority.
If you would like to contribute more, Caslon has a great post here with advice. It’s more than a game though, we all come here not just for the stories, but for the high quality comments. Contributing high quality comments is a real benefit to others, whether your gamifying it or not. Having the discipline not to comment when you don’t have a real contribution to make is also valuable, you’re being a good member of the community. I commented on this post almost an hour after first reading it. I wanted to be sure I had something I thought was worthwhile to say.
Another way you can contribute is through voting, especially if you vote based not on agreement or disagreement, but on insightful or informative contribution to the debate.