Option B look-dev: shared stone-base language, per-type turret that visibly GROWS at each upgrade level, one light direction (upper-left) with soft cast shadows. Enemies keep a 1:1 species mapping with today's emoji (🐀🦇🧌🐉🐢🐜) — silhouette-first, gradient-shaded, glossy eyes. The right column shows every asset at its REAL in-game size on the board texture — that's the readability check that matters.