Easy game developed in Unity

I need a game project for phones (Android) developed in Unity 2D, based on Galaga; Its a ship game, I only need 3 levels, and in the third level a boss, I need both the movement of the ship to be programmed, passing the finger across the screen, as well as the shots and the enemies, and the boss do not need to have some kind of special ability, just having a life bar and taking damage is enough. So i need: A main Screen, level 1, level 2 and level 3 (boss).