This gave me Space Invaders vibes. It is good start to a game. It felt like the ship was a bit slow to move. I would maybe crank that up a bit. The guns did not seem varied enough but were both fun to shoot. I almost never had a reason to want to fire the center cannon over the dual wing cannons especially since the dual cannon mean I exposed less of the ship to the enemy fire. You need to find a way to incentivize the center cannon. Overall a nice submission for a Game Jam! Keep it up.