You need to be specific on what assets you'd need. Do you need 2D or 3D assets? do you need background layers, sprites, front layers or something else? do you need music tracks?
I'm looking for 2D pixel art (background layers, sprites, front layers) for a platformer game that I want to develop. I'll update the list of things I need as I go through developing the game. I'll try to do the rest of creating the game myself, I just need the art.