The current version of every glyph sprite in the game, generated live from
game/sprites.js — the single source of truth shared with the playable prototype.
Change a sprite there and it updates here and in-game.
Walls are single glyphs auto-tiled from N/E/S/W neighbours (box-drawing). Floor is a checker for depth.
One hue per material. Sprites pull only from this set — never a one-off hex.