Original start: X=2, Y=3, facing 90° (east), torch on.
Keyboard: ↑ or W = forward, ←/A = turn left, →/D = turn right, T = torch, R = re-run.
Renderer and movement rules are translated directly from the recovered Macintosh BASIC. One obvious source typo in routine 4010 (2250 instead of 250) is corrected.