Like lemmings, and a bridge-building game. Reminds me a lot of old-school flash games. The music adds a lot to the experience. There's a very decent physics core to this game.
Unfortunately, I got stuck at level 4. I'd gladly play through the rest if you'd give me some tips (a "hint" button would be handy, or being able to skip some levels).
I wasn't exactly sure what the main character is - is it a meatball? bowl of ice-cream? It doesn't really matter for a jam, but come clarification, etiher visually or otherwise would be nice.
The amount of instruction in the first level is a bit overloaded, consider spreading that out a bit more.
I think it would be more integral if the pins you move around begin in the level, rather than as a ui piece. The moving pins around, and the sound effects associated, was rather satisfying.