I submitted it to a few portals. JayIsGames was first - they like to link to new, interesting web games, and other portals watch JayIs for new content. JayIs didn't feature it, but instead put it on a Friday "Link Dump" (so yeah, the linked got "dumped").
From there, it got picked up by portals I've never even heard of, like 123spill.no. To this day a large portion of my hits come from Norway.
Unfortunately Digg's "playable web games" category didn't pick it up. That's probably the holy grail.
Licensing the game can be a double-edged sword. On one hand it can bring in immediate cash. On the other hand, if you license a web game to somegameportal.com, and a popular site like Digg links to somegameportal.com instead of your site, you've probably lost money over time.
Nice game. I clicked an ad for you.
Well, cool, I'm glad you like the game, but clicking ads because you like the game is a bad idea - Google will shut down my account if it detects "fake" clicks. So please only click an ad if you really are interested in the ad