Arse, I'd so entirely buy it right now if it weren't for the billing address stuff. I'll look for a way to buy anonymously and come back with my address if I can't.
I'll say this while I'm here though, the high-res semi-transparent hit/blocksparks pop a bit much over the otherwise entirely opaque silhouette aesthetic. What I'd recommend is to make them opaque, but dithered, in the style of Mark of the Wolves.
e: Also, I'm on Linux and I'll be glad to test on that if that's alright with you.