Double whale movement oscillation

- Increased horizontal whale movement from 15px to 30px
- Increased vertical whale movement from 10px to 20px
- Whale now bobs twice as much, increasing difficulty
- Makes targeting more challenging

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/scenes/HuntingScene.js

@@ -310,9 +310,9 @@ export default class HuntingScene extends Phaser.Scene {
         const baseX = whale.getData('baseX');
         const baseY = whale.getData('baseY');
 
-        // Gentle horizontal and vertical oscillation
-        const offsetX = Math.sin(bobTime) * 15; // 15 pixels horizontal movement
-        const offsetY = Math.cos(bobTime * 0.7) * 10; // 10 pixels vertical movement
+        // Horizontal and vertical oscillation
+        const offsetX = Math.sin(bobTime) * 30; // 30 pixels horizontal movement
+        const offsetY = Math.cos(bobTime * 0.7) * 20; // 20 pixels vertical movement
 
         whale.x = baseX + offsetX;
         whale.y = baseY + offsetY;