2D top HUD bar for a zombie survival game, flat game UI design, minimalist and clean interface. Horizontal top interface bar divided into three sections: Left panel for the wave counter Center panel for dynamic game messages Right panel for remaining enemies counter The style should be 2D flat design, slightly gritty zombie apocalypse theme, subtle scratches and grunge texture but still clean and readable. Dark gray panels with muted green toxic accents, thin outlines, modern survival shooter interface. Simple geometric shapes, rectangular UI panels, balanced spacing, professional game HUD layout. No text, no numbers, no icons, only the empty UI frames for later use in a game engine. Transparent background, centered asset, high resolution, game-ready 2D UI asset, Unity HUD style. flat 2D game UI, HUD interface, zombie survival theme, clean vector style, transparent background, PNG, 4k, game asset