In my personal opinion this makes me guess that the intention of the game is move the ball around the scenery to reach a goal, with another player helping you to not fall.
I think that the game description need to be more clear, what's the the goal of the game? it doesn't matters that you didn't finish all the mechanics that you planed, at the end we always have the description space to tell the players what have you done and how they can interact with the game (controls).
keep going! I would like to see this idea finished!