Sorry bro, this is not a game. This is prototype for you, just so you know how to make player walk and swing. If you want to submit a game, make something solid, with some idea, some cool mechanics and different feature.
Just as you, this is my first game what i made for this GameJam. If you want to make game, try to learn more. 3D games are much harder than 2D, so try firstly at two dimensions.
(I don't know what engine you used, but) Unity is not an only game engine. Check engines that recommended at WeeklyGameJam page. Check GoDot, Ct.js, Construct, GameMaker, find your favourite tool.