I'm not quite so fond of the game itself (I think the concept is extremely unpolished and rather bland), but these stills vedsten posted really shows the overall quality of the art in the game throughout...
WHICH IS TOTALLY COMPLETELY AWESOME.
(The Dragon is insane. So insane, in fact, it deserves its own paragraph.)
Other than that, it uses most of your standard pixel techniques to create some sort of... crazyass pixel art... game... wow.
I would point out the texture of the concrete wall. It repeats frequently, especially on the leftmost bricks. However, despite repeating so much, DC still manages to EFFECTIVELY eliminate the grid.
The fire highlights to the mouth of the flame thing is cool, too.
The ground has got to be one of the best platformer platforms I've ever seen. The usage of color conservation + the feelings the recycled "musty" yellows generate = 0WN4G3! And skeletons are definitely better than any plain ol' marble, grass, dirt, run-of-the-mill platform.
The main sprite crams in a HELL of a lot of detail. Its hue-rotating colors add subtle nuances to the character.
The Dragon. Damn. Note the dark blues used to balance out the rest of the piece. Yellow, tan, and white highlights used appropriately... and a very nice shade of bronze. Note its decomposed internal organs, so skillfully placed. Breaking monotony. Note... well, the entire Dragon, because damn, when I saw that thing animated...
There's a really great usage of colors next to the entrance of the shop. the green and orange hues really mix in outside light into the shop. The window light shows bending of light as it passes through certain mediums, and the back wall gets to benefit from the greens and oranges as well (not to mention the whole room is sorta highlighted with that dank green).
And uh... that's all I feel like doing/ am capable of looking at. DC is an amazingly sexy game. Indeed.