POKE 6365,00

This removes the command;

DEC (HL)

Which is used to decrease the player life counter held at 5E3D.

POKE 6D47,18

This changes the command;

JR NZ,6D56

To just;

JR 6D56

This removes the condition for the jump command completely, so will always just continue with execution.

POKE 6D5C,00

POKE 6826,C9

This alters the command which returns when there's been a collision from;

RET NC

To just;

RET

POKE 6FEF,C9

This alters the command which returns when there's been a collision from;

RET NC

To just;

RET

POKE 6FC2,00

This removes the command;

DEC HL

NOTE: The obstacles are still present! They're just not printed to the screen.

POKE 6B05,00

This changes the counter from;

LD HL,0118

To;

LD HL,0018