Buggy, this is not my video - I didn't post it to Vimeo, it was posted by someone from the Tron-sector.com forums and so I can't edit the description. Honest! It's not me! ;-) However, by embedding the vid in the page, I hope to avoid that misconception.
Really? In that case, I'm sorry. I guess that means you do have fans (or at least one)! Sorry about that. I was so sure that it was you with this: "640X480 res. will do a full 1024X768 asap." That sounds like the poster is in charge of making the game. Oh, wait. I just realized. That's the video resolution. Sorry. Now I feel both dumb and mean after ripping on you like that.
Anyway, have you considered making more YouTube videos? I see a lot of games that have at least a teaser trailer, an official (longer) trailer, and a few gameplay videos as well.
Have you considered things to attract attention? Without discounting your price (I'd strongly recommend against that right now) and without online gameplay to modify, nothing really comes to mind. All I know is that when I found a recent pay-once online game that offers a weekly free people-with-demos-can-play-online-without-buying-the-product hour, I was thinking about that one hour all week long. Since Tank Universal's not multiplayer, this of course would not be an option, but if you could come up with something else, it might spur players that have already bought it to participate more, which would spur more potential customers to buy. Like a best in-game photo contest? With some kind of prize?