It's good.
May as well not even say anything about the graphics, because you know for a fact that they are awesome. But then they had to be, didn't they? For a game a simplistic as Russian Roulette you can't just throw some vector-art stick-men in there and expect to pull it off. That being said, this game is, unfortunately, only a real gem because of its graphics, and the mood it sets with them. There are a few things that make it somewhat more than just a straight Russian Roulette simulator, but I can't see myself playing this after today.
Also, though I may be alone in this, I was very confused by the "story" - what little there was, that is - and it seemed to confuse the game-play, sort of. I could never tell what my objective really was. And I kept wondering if it really was just to try and win my way through the oddd assortment of characters in the game. And it really confused me in the end when I defeated Daisy for the last piece of the key (I also found it odd that beating the same group of characters multiple times is what I had to do to earn different pieces of this key), I had to battle some black version of what appeared to be the Daisy character carrying a scythe and in the same stage or screen as Daisy appeared, and after he blew his head off it told me I had to burn the plague in hell. But what it presented me with was, I believe, the character purchase screen. So, I clicked the black Daisy character (who was now available) and it asked me if I was sure I wanted to spend 1,000,000 to battle this character. After some deliberation with myself, I agreed, and was faced with yet another match against the black Daisy character, only this time I was in what I can only guess was hell, since there was a lot of fire and a big floating head in the background that sometimes flashed. I LOST that match... and a screen came up congratulating me for burning the plague in hell. I was awarded 100,000 I think, and was placed back on the character purchase screen. So, I purchased another character, and it again asked me "It will cost X HLD to battle so-and-so, would you like to continue?", I agreed, and fought them. I did this several times, and no matter whether I won or lost against the character I purchased, it always congratulated me afterward for having burned the plague in hell, and again would award me 100,000 points. It seemed like a bug, but with the rest being as confusing as it was anyway, I couldn't be sure.