You should probably offer more detail if you want anyone to help… people will probably want to know things like:
- What art style/medium are you looking for?
- What genre of game, or at least what sort of projection is everything supposed to be drawn in?
- Do these sprites need animation? Is it 16 still images, 16 animations, 16 characters worth of images? (The latter of which could wind up being way more than 16 sprites total)
Writing about the game itself would probably also help people decide if they want to help as well… in general, the more you share the more likely someone might help. If the request is too vague a lot of folks will avoid it since they don’t know if they can even complete it, much less what sort of workload is being asked for.