Yeah, it's fine that your game is not perfect, because it will most likely never be for a game jam. The time restrictions are crazy. It was one week but we also had to cut out stuff from our game. It's just important that you keep track of what you still have to do and start throwing out features early on. Focus on the main mechanic of your game. In your case the platforming (same in our game :D) and really get the controls working. If you take longer for it to feel great then you should start thinking about changing the story early on so that you get everything finished until the end.
Nonetheless, as already said. Great job for being alone ;)