public Content_Manager(Game1 game_1)
        {
            this.game_1 = game_1;

            player_tex = game_1.Content.Load <Texture2D>(@"Image/Character/robot");
            enemy_tex  = game_1.Content.Load <Texture2D>(@"Image/Character/chomper_robot");

            platform_tex = game_1.Content.Load <Texture2D>(@"Image/Tile/tile_test");

            goal_tex = game_1.Content.Load <Texture2D>(@"Image/Item/flag");

            power_up_tex   = game_1.Content.Load <Texture2D>(@"Image/Item/robot_power_glove");
            point_item_tex = game_1.Content.Load <Texture2D>(@"Image/Item/pink_battery");
            jump_boost_tex = game_1.Content.Load <Texture2D>(@"Image/Item/rocket_boots");
            trampoline_tex = game_1.Content.Load <Texture2D>(@"Image/Item/trampoline");
            ladder_tex     = game_1.Content.Load <Texture2D>(@"Image/Item/ladder");

            particle_textures.Add(game_1.Content.Load <Texture2D>(@"Image/Particle/circle"));

            hud_font = game_1.Content.Load <SpriteFont>(@"Font/hud_font");

            gets_point    = game_1.Content.Load <SoundEffect>(@"Sound/eat_candy");
            destroy_enemy = game_1.Content.Load <SoundEffect>(@"Sound/hit");

            particle_engine = new Particle_engine(particle_textures, Vector2.Zero);
        }
        public void Add_particel_engine(Tower tower)
        {
            Particle_engine particle_engine = new Particle_engine(particle_textures, Vector2.Zero);

            particle_engine.active = true;

            particle_engine.emitter_location = new Vector2(tower.Center.X, tower.Center.Y);

            particel_engines.Add(particle_engine);
        }