Hey, I didn't get to finish everything I planned either. Fact of the matter is: we both made something. You made a game-- nothing can change the fact that you made a game. A real, actual game with programming and graphics and stuff. That's amazing! And it means you know more than you did before; you're more experienced than you were before, and hopefully you had some fun in the process. That's what this jam's all about.
And if you're dedicated to this project and wanna make more out of it after the jam... You can do that! Totally up to you. World's your oyster.
I, for one, can't wait to play your game.