indie video game thumbnail, no text words, image is colorful, split composition, left side shows a glowing geometric square with sharp corners, right side shows a glowing triangle made from the same shape, transformation implied, bright red arrow pointing from square to triangle, pieces breaking off the square and flying toward the triangle, subtle particle effects, dark background with neon glow, high contrast lighting, simple clean shapes, center-weighted composition, strong visual clarity, lots of padding around edges for cropping, no text, no watermark, no blur, no clutter, no UI, no borders