flat cartoon game UI frame, bold thick clean black outlines, minimalist simple design, only two colors with light and dark variations, a wide horizontal rectangular frame, much wider than tall, landscape format, two simple stone pillars on the left and right sides like catacomb columns, plain carved stone blocks, cracked old stone, gothic catacombs architecture, flat solid color fills, no gradients, no vines, no decorations, no clutter, perfectly symmetrical, large empty dark center for game reels, clean geometric shapes, isolated on dark background Mehr sehen