If you're looking for help developing a game, it's best to post here:
https://itch.io/board/10020/help-wanted-or-offered
One piece of advice: clarify what you mean by 8 or 16 bit. Are you talking about a game that runs on a modern engine but has an 8 or 16-bit aesthetic? Or are you referring to developing a game on actual 8 or 16-bit hardware? If so, specify which hardware you mean; developing for a Game Boy is not the same as developing for a Sega Genesis.
Do you need an artist or a programmer?