Double speed and super jumps:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.
POKE 2169,234
POKE 2170,234
POKE 2171,234
POKE 2172,234
POKE 2173,234
POKE 2174,234
POKE 2175,234
POKE 2176,234
POKE 2177,234
POKE 2178,234
POKE 2179,234
POKE 2180,234
POKE 16018,9
POKE 16019,9
POKE 16020,9
POKE 16021,9
SYS 2097