Subterranea

Cheat mode:
Load or reset the game, then execute the following BASIC commands before running or restarting the program.
POKE 5975,234
POKE 5976,234
POKE 5977,234
SYS 50167

No opponents:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 4434,181

Turbo mode:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 3069,200

Wobble levels:
Load or reset the game, then execute the following BASIC command before running or restarting the program.
POKE 3039,123