Remember, even if you've been exposed to something in the past, it doesn't mean you know what it is. I clicked on the article on the HN page, by reading the title, and didn't see the domain until I went to click on the back button. I can't say that I didn't have any inkling that it was a game, and whether it was from the mine craft like picture or the url I can't say (though I don't know for sure that humble bundle is only games.)
IF people are tweeting this page, how many people who see that tweet are likely to follow it and have never heard of Humble Bundle before? So, they'd know even less than I would...
I wish you the best, whatever it is you are, so constructive feedback follows:
Voxatron is too humble. I just went to the page. I had my browser window pretty big... taking up most of a 21" monitor.
Here's what I could tell about Voxatron:
1. It's called voxatron
2. It's "pay what you want".
3. It supports charity
4. It is DRM free
5. The people behind voxatron thought a sorta mincraftish image would communicate something significant to me.
6. It seems like it can run on a Mac.
I think these are all, clearly, features you wanted to communicate, and you succeeded in doing so very well.
However, I then hit my back button because, in the time it took me to grasp on that, I realized I had no clue what Voxatron was.... and I have spent too much time trying to figure things like that out in the past on other sites such that I've gotten the impression that if I don't get it right away, I likely never will. (Seriously, I can't tell you how many times I've followed links from google, gotten to a corporate site, spent 5-10 minutes there, unable to make heads or tails-- when I got there because, according to the query I crafted for google, google thinks this company is selling what I wanted to buy RIGHT THEN. The barrier is much lower for links on HN.)
Is it a game? Is it a voice transcoder? Is it an auto tuner? Is it for musicians? Is it for kids playing around with digital signal processing?
Give me a one line description of what voxatron is or does, without too much hyperbole, and put it front and center, maybe right under or replacing the word "voxatron" where it is now on the page. And if there IS Such a line, and I completely missed it, then I think your page layout is too busy and it caused me to overlook it.
You got my 11 seconds, but didn't get me very far down the funnel to conversion.
Again, with all respect, and hopes that this is helpful-
IF people are tweeting this page, how many people who see that tweet are likely to follow it and have never heard of Humble Bundle before? So, they'd know even less than I would...