- 6,589 instructions (81.9% code), 240 semantic labels, 186 zero-page aliases - BYTE-IDENTICAL build verified - Key routines: Reset, NmiHandler, MainGameLoop, InitPPU, InitSound, UpdateSprites, UpdateGameState - Zero-page aliases: PPUCtrlShadow (0), PPUMaskShadow (1), PPUScrollX/Y (2/3), GameState (/bin/bash3), PlayerLives (/bin/bash4) - Root OVERVIEW.md updated to reflect Pass 2 completion