Press ESC during game play to enter the options menu and select the "Redefine Keys" option. Then, redefine one of the following combination of keys. Note: After redefining the keys, they will return to their original setting.
Invincibility (KNTIMMUNE) Left: K Right: N Up: T Down: I Action: M Run/Walk: M Fire: U Pause : N In Game Options : E
Level up (KNTLEVELP) Left: K Right : N Up: T Down: L Action: E Run/Walk: V Fire: E Pause : L In Game Options : P
Additional life (KNTONLIFE) Left: K Right : N Up: T Down: O Action: N Run/Walk: L Fire: I Pause : F In Game Options : E