Gong Xi Fa Cai! Welcome to the year of the Dragon. Also I'm finally making one of these in a timely fashion when the game is released .
I haven't had as much fun playing a game like this since N was just a flash game, and yes that includes you Super Meat Boy. While the comparison isn't exactly right, but the way that the movement flows in all of those games has the same sort of feeling. It also manages to make sweeping floors and dusting walls about a billion times cooler than it actually is in real life so that bit's fun.
Unlike the afrore mentioned games you can actually attack back with a heavy and light attack, I for the most part just spam light attack till they die, but as the replays show that's not actually the best way to do it. By moving over dust and beating up dust infected enemies you increase your combo meter and to get an S rank in finesse you need to never drop that combo for the entire length of the level. Getting an S rank for completion you get for clearing all of the dust from the level.
So you have this really cool aspect of trying to double S rank the levels while also setting the best time you can, which for me isn't actually that good. One of the things I dislike about Dustforce is that rather a lot of the game's harder levels are locked off at the start, which is fine but the way you unlock them is by double S ranking the easier levels. Which is no easy feat to do. So you could probably get by without actually seeing some of the harder levels. Apparently only 2 people have managed to double S rank one of the levels.