Unlimited lives:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 58199,165
POKE 61881,165
SYS 52992 
Unlimited lives (alternate):
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 58199,165
POKE 61881,165
POKE 63890,165
SYS 52992 
Invincibility:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 61875,76
POKE 61876,187
POKE 61877,241
SYS 52992 
Unlimited time:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 63890,165
SYS 52992 
One diamond to complete level:
Load or reset the game, then execute the following BASIC commands before running or restarting the program. 

POKE 64017,169
POKE 64018,0
SYS 52992