Unity mapping
W=Wall, X=Exit, +=Sticky, F=Fragile, ^ > ⌄ < = Pushers, S=Star, digits/letters=IDs (Deadly/Toggle/Trigger/Teleport).
IDs: 1..9,a..z (re-uses gaps). Teleport: pairs in tiles with TeleportConfig or TeleportOrangeConfig + target.
Coordenadas: startX=coluna, startY=linha. Origem no topo-esquerda (0,0).