Type the following cheat codes one letter at a time during gameplay to cheat:

BLAKE Get both keys
FEELGOOD Full health

Enter these codes the same way, but these work only in the registered version of the game:

BANANA Laser shots
QUARK Rapid fire

Simply a great platform game. Similar to Clyde's Revenge (they were both designed by Moonlite Software) but this one has better graphics, plus it's more exciting, because there are enemies to kill! If you haven't played it, you definitely should. The zipfile is a bit big, but it's worth it.