Use Game class, add a basic structure for main menu and game screens

core/src/com/redstrate/watersymbol/GameScreen.java

@@ -0,0 +1,47 @@
+package com.redstrate.watersymbol;
+
+import com.badlogic.gdx.Screen;
+import com.badlogic.gdx.utils.ScreenUtils;
+
+public class GameScreen implements Screen {
+    private final WaterSymbol game;
+
+    GameScreen(WaterSymbol game) {
+        this.game = game;
+    }
+
+    @Override
+    public void show() {
+
+    }
+
+    @Override
+    public void render(float delta) {
+        ScreenUtils.clear(0, 0, 0.2f, 1);
+    }
+
+    @Override
+    public void resize(int width, int height) {
+
+    }
+
+    @Override
+    public void pause() {
+
+    }
+
+    @Override
+    public void resume() {
+
+    }
+
+    @Override
+    public void hide() {
+
+    }
+
+    @Override
+    public void dispose() {
+
+    }
+}

core/src/com/redstrate/watersymbol/MainMenuScreen.java

@@ -0,0 +1,74 @@
+package com.redstrate.watersymbol;
+
+import com.badlogic.gdx.Gdx;
+import com.badlogic.gdx.Input;
+import com.badlogic.gdx.Screen;
+import com.badlogic.gdx.graphics.OrthographicCamera;
+import com.badlogic.gdx.graphics.g2d.GlyphLayout;
+import com.badlogic.gdx.utils.ScreenUtils;
+
+public class MainMenuScreen implements Screen {
+    OrthographicCamera camera;
+
+    GlyphLayout titleLayout;
+
+    MainMenuScreen(WaterSymbol game) {
+        this.game = game;
+
+        camera = new OrthographicCamera();
+        camera.setToOrtho(false, 800, 480);
+
+        titleLayout = new GlyphLayout(game.font, "WATER SYMBOL");
+    }
+
+    @Override
+    public void show() {
+
+    }
+
+    @Override
+    public void render(float delta) {
+        ScreenUtils.clear(0, 0, 0.2f, 1);
+
+        camera.update();
+        game.batch.setProjectionMatrix(camera.combined);
+
+        game.batch.begin();
+        game.font.draw(game.batch, titleLayout,
+                (camera.viewportWidth / 2) - (titleLayout.width / 2),
+                camera.viewportHeight / 2);
+        game.batch.end();
+
+        if(Gdx.input.isButtonJustPressed(Input.Buttons.LEFT)) {
+            game.setScreen(new GameScreen(game));
+            dispose();
+        }
+    }
+
+    @Override
+    public void resize(int width, int height) {
+        camera.setToOrtho(false, width, height);
+    }
+
+    @Override
+    public void pause() {
+
+    }
+
+    @Override
+    public void resume() {
+
+    }
+
+    @Override
+    public void hide() {
+
+    }
+
+    @Override
+    public void dispose() {
+
+    }
+
+    private final WaterSymbol game;
+}

core/src/com/redstrate/watersymbol/WaterSymbol.java

@@ -1,31 +1,29 @@
 package com.redstrate.watersymbol;
 
 import com.badlogic.gdx.ApplicationAdapter;
+import com.badlogic.gdx.Game;
 import com.badlogic.gdx.graphics.Texture;
+import com.badlogic.gdx.graphics.g2d.BitmapFont;
 import com.badlogic.gdx.graphics.g2d.SpriteBatch;
 import com.badlogic.gdx.utils.ScreenUtils;
 
-public class WaterSymbol extends ApplicationAdapter {
+public class WaterSymbol extends Game {
 	SpriteBatch batch;
-	Texture img;
-	
+	BitmapFont font;
 	@Override
 	public void create () {
 		batch = new SpriteBatch();
-		img = new Texture("badlogic.jpg");
+		font = new BitmapFont();
+		this.setScreen(new MainMenuScreen(this));
 	}
 
 	@Override
 	public void render () {
-		ScreenUtils.clear(1, 0, 0, 1);
-		batch.begin();
-		batch.draw(img, 0, 0);
-		batch.end();
+		super.render();
 	}
 	
 	@Override
 	public void dispose () {
 		batch.dispose();
-		img.dispose();
 	}
 }