General code optimization

core/src/com/mygdx/game/Main.java

@@ -1,9 +1,37 @@
 package com.mygdx.game;
 
 import com.badlogic.gdx.Game;
+import com.badlogic.gdx.graphics.OrthographicCamera;
+import com.badlogic.gdx.graphics.g2d.SpriteBatch;
 
 public class Main extends Game {
+	public SpriteBatch batch;
+	public OrthographicCamera camera;
+	public Fonts fonts;
+	public Background background;
+
 	public void create() {
+		batch = new SpriteBatch();
+
+		camera = new OrthographicCamera();
+		camera.setToOrtho(false, 800f, 600f);
+
+		fonts = new Fonts();
+
+		background = new Background();
+
 		this.setScreen(new MainMenuScreen(this));
 	}
+
+	@Override
+	public void render() {
+		super.render();
+	}
+
+	@Override
+	public void dispose() {
+		batch.dispose();
+		fonts.dispose();
+		background.dispose();
+	}
 }

core/src/com/mygdx/game/MainMenuScreen.java

@@ -1,62 +1,48 @@
 package com.mygdx.game;
 
-import com.badlogic.gdx.Game;
 import com.badlogic.gdx.Gdx;
 import com.badlogic.gdx.Input;
 import com.badlogic.gdx.Screen;
 import com.badlogic.gdx.graphics.Color;
 import com.badlogic.gdx.graphics.OrthographicCamera;
 import com.badlogic.gdx.graphics.g2d.BitmapFont;
-import com.badlogic.gdx.graphics.g2d.SpriteBatch;
 import com.badlogic.gdx.utils.ScreenUtils;
 
 public class MainMenuScreen implements Screen {
-	private Game game;
+	private Main game;
 	private OrthographicCamera camera;
-	private Background background;
 	private Player player;
 	private boolean isTextureDown;
-	private float timer;
+	private float animTimer;
 	private BitmapFont titleText;
 	private BitmapFont startText;
-	private Fonts fonts;
-	private SpriteBatch batch;
 
-	public MainMenuScreen(Game game) {
+	public MainMenuScreen(Main game) {
 		this.game = game;
 	}
 
 	@Override
 	public void show() {
-		camera = new OrthographicCamera();
-		camera.setToOrtho(false, 800f, 600f);
-
-		batch = new SpriteBatch();
-
-		background = new Background();
+		camera = game.camera;
 
 		// passing null for the PipeManager parameter to avoid unnecessary instantiation
 		player = new Player(null);
 
 		isTextureDown = true;
 
-		fonts = new Fonts();
-
-		titleText = fonts.createFont(60, 3, Color.WHITE);
+		titleText = game.fonts.createFont(60, 3, Color.WHITE);
 
-		startText = fonts.createFont(24, 0, Color.BLACK);
+		startText = game.fonts.createFont(24, 0, Color.BLACK);
 	}
 
 	@Override
 	public void render(float delta) {
 		ScreenUtils.clear(0, 0, 0, 1f);
 
-		// timer increments based on the time since the last frame
-		timer += Gdx.graphics.getDeltaTime();
+		animTimer += Gdx.graphics.getDeltaTime();
 
-		// switch isTextureDown to its opposite value every half a second
-		if (timer >= 0.5f) {
-			timer = 0;
+		if (animTimer >= 0.5f) {
+			animTimer = 0;
 
 			isTextureDown = !isTextureDown;
 		}
@@ -68,18 +54,18 @@ public void render(float delta) {
 			player.getPlayerSprite().setTexture(player.getPlayerTextureUp());
 		}
 
-		batch.setProjectionMatrix(camera.combined);
-		batch.begin();
+		game.batch.setProjectionMatrix(camera.combined);
+		game.batch.begin();
 
-		background.draw(batch);
+		game.background.draw(game.batch);
 
-		player.draw(batch);
+		player.draw(game.batch);
 
-		titleText.draw(batch, "Flap-tastrophe", 100f, 550f);
+		titleText.draw(game.batch, "Flap-tastrophe", 100f, 550f);
 
-		startText.draw(batch, "Click anywhere to start", 400f, 300f);
+		startText.draw(game.batch, "Click anywhere to start", 400f, 300f);
 
-		batch.end();
+		game.batch.end();
 
 		if (Gdx.input.isButtonJustPressed(Input.Buttons.LEFT)) {
 			// set the player texture to playerTextureDown before switching to the game screen for a smooth transition
@@ -111,11 +97,8 @@ public void hide() {
 
 	@Override
 	public void dispose() {
-		background.dispose();
 		player.dispose();
 		titleText.dispose();
 		startText.dispose();
-		fonts.dispose();
-		batch.dispose();
 	}
 }

core/src/com/mygdx/game/PipeManager.java

@@ -57,6 +57,7 @@ public void draw(SpriteBatch batch, float deltaTime) {
 		for (Pipe p : pipes) {
 			p.movePipe(deltaTime, collisionCheck, moveUp);
 
+			// updates the pipe's opacity based on the setAlpha flag
 			if (setAlpha) {
 				p.getPipeSprite().setAlpha(0.5f);
 			} else {

core/src/com/mygdx/game/Score.java

@@ -63,7 +63,7 @@ public int scalingAmount() {
 		return 0;
 	}
 
-
+	// notifies subscribed classes on score changes to update difficulty scaling
 	public void notifyDifficulty() {
 		int scalingAmount = scalingAmount();