feat(cd): add Matrix notification on deploy failure

Sends a message to a Matrix room when a deploy fails, including
the failing services, commit, deployer, and a link to the logs.

Requires two GitHub Actions secrets:
- DEPLOY_NOTIFY_ROOM_ID: Matrix room ID
- DEPLOY_NOTIFY_BOT_TOKEN: Matrix bot access token

Skips silently if secrets are not configured.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

games/whopixels/js/scenes/MainMenuScene.js

@@ -0,0 +1,98 @@
+class MainMenuScene extends Phaser.Scene {
+	constructor() {
+		super({ key: 'MainMenuScene' });
+	}
+
+	create() {
+		// Add background
+		this.add.image(400, 300, 'background');
+
+		// Add title
+		this.add
+			.text(400, 120, 'WhoPixels', {
+				fontSize: '64px',
+				fill: '#fff',
+				fontStyle: 'bold',
+			})
+			.setOrigin(0.5);
+
+		// Add subtitle
+		this.add
+			.text(400, 180, 'Ein Pixel-Abenteuer', {
+				fontSize: '32px',
+				fill: '#fff',
+			})
+			.setOrigin(0.5);
+
+		// Create buttons
+		const startButton = this.add
+			.text(400, 280, 'RPG Spiel starten', {
+				fontSize: '32px',
+				fill: '#fff',
+				backgroundColor: '#4a4a4a',
+				padding: { x: 20, y: 10 },
+			})
+			.setOrigin(0.5)
+			.setInteractive();
+
+		const editorButton = this.add
+			.text(400, 350, 'Pixel Editor', {
+				fontSize: '32px',
+				fill: '#fff',
+				backgroundColor: '#4a4a4a',
+				padding: { x: 20, y: 10 },
+			})
+			.setOrigin(0.5)
+			.setInteractive();
+
+		const optionsButton = this.add
+			.text(400, 420, 'Optionen', {
+				fontSize: '32px',
+				fill: '#fff',
+				backgroundColor: '#4a4a4a',
+				padding: { x: 20, y: 10 },
+			})
+			.setOrigin(0.5)
+			.setInteractive();
+
+		// Button interactions - RPG Game
+		startButton.on('pointerover', () => {
+			startButton.setStyle({ fill: '#ff0' });
+		});
+
+		startButton.on('pointerout', () => {
+			startButton.setStyle({ fill: '#fff' });
+		});
+
+		startButton.on('pointerdown', () => {
+			this.scene.start('RPGScene');
+		});
+
+		// Button interactions - Pixel Editor
+		editorButton.on('pointerover', () => {
+			editorButton.setStyle({ fill: '#ff0' });
+		});
+
+		editorButton.on('pointerout', () => {
+			editorButton.setStyle({ fill: '#fff' });
+		});
+
+		editorButton.on('pointerdown', () => {
+			this.scene.start('GameScene');
+		});
+
+		// Button interactions - Options
+		optionsButton.on('pointerover', () => {
+			optionsButton.setStyle({ fill: '#ff0' });
+		});
+
+		optionsButton.on('pointerout', () => {
+			optionsButton.setStyle({ fill: '#fff' });
+		});
+
+		optionsButton.on('pointerdown', () => {
+			// Options functionality would go here
+			console.log('Options button clicked');
+		});
+	}
+}