Well, here's a working mockup for a game (horizontal scrolling shooter) I might make, and I'd like a little bit of critique on the art. However, keep in mind that the game is intended to be played with the single pixels bigger than normal. Several zoom-in clicks (EDIT: 3 or 4) should give you an idea of the size I intend to use.
Other information: the purple crosshair is a cursor, and the purple-and-green pattern was me fiddling around. Maybe it could be a mine or something. The blue star was originally intended to be a power-up, but I think it might be another mine or something.
(EDIT2: The ground is solely a placeholder.)
And here's the image:
