I like how the boss kind of dances with the music too. The album is already out if I'm not wrong?
As for you, guys, I would take some of the advises listed here. One thing was done perfectly: the game has no inertia. Good start. It needs a clearer visual damage feedback to know when to move away from threats.
Gamersgate is a service based on Europe (so it's pretty fairly priced for them) and accepts several types of payments, including PayPal. I bought Zeit2 here when it was on a sale. This game requires Steam to run but you could have a separate, DRM free version along with a proper Steam releases (you might get asked if the game will include achievements or leaderboards, those can still be added later on/post release anyway, as well as patching/updating and getting feedback from the game's forum).
It's a fairly solid service, although nowhere near as big as Steam but, in turn, it means the publishing of a game is slightly easier (and faster, Valve can take its fair share of time to reply).
The FAQ holds most answers:
http://www.gamersgate.com/info/faq
The delivery methods, as I mentioned, vary heavily from game to game. Some are DRM free and just download the installer, some come completely locked out with DRM (I think a Visual Novel I wanted to buy had SecuROM, one of the worst! Really, you don't do that to a Visual Novel...), others might require Steam or other 3rd party programs. That info is usually displayed on the game page so the user is warned before buying.
There is also the, now Gamestop owned, service Impulse:
http://www.impulsedriven.com/
It defaults to my local currency and is based in America so it might be useful as well. I didn't try (I will the minute I get a stable job, which should hopefully be way sooner than later) but it looks neat too. Like Steam, it seems that it requires some sort of 3rd party program to run the stuff.
Good luck and looking forward to try the full game!