Replaces the instruction which would otherwise take a life away when the player is put back at the start. The new instruction clears the sign flag, so the jump to the game over screen is never made.

49914	LD HL,42785
49917	DEC (HL)
49918	JP M,ShowGameOverScreen

To:

49914	LD HL,42785
49917	XOR A
49918	JP M,ShowGameOverScreen