Get More Lives:
Each time you lose the game with 0 lives you will increase the number
Get 3 Credits:
Use the continue option more than 15 times to get 3 more credits on the options menu
Get 4 Credits:
Use the continue option more than 30 times to get 4 more credits on the options menu
Get unlimited Credits:
Use the continue option more than 100 times to get unlimited credits on the options menu
Get More Time:
Each time you lose the game with 0 time you will increase the number
Swap 1/2 life for 5 seconds:
After pausing the game press Up, Up, Down, Down, Left, Right, Left, Right, X, Circle
Swap 5 seconds of life for 1/2 life:
After pausing the game press Circle, X, Right, Left, Right, Left, Down, Down, Up, Up
Disable Enemy Markers:
Go to the mode select screen and press Right, Right, Right, Right, Left, Down, Up, Right.
