I started using Unity at the start of this year and stumbled across game jams so decided to give one a try. I've just submitted my first game jam ever which can be played in the browser here:

Two Friends One Keyboard

Its a 2 player, split screen local multiplayer co-op game. A platformer where you need to work together with a friend to progress through levels (although you can solo it too). Press the pressure plates at the same time to open the exit.