Enter these five-digit cheat codes in the 'Cheat Codes' menu:

Infinite Lives
X, SQUARE, TRIANGLE, X, CIRCLE.

Sights
CIRCLE, CIRCLE, X, TRIANGLE, SQUARE.

Snipe
SQUARE, CIRCLE, X, TRIANGLE, CIRCLE.

Mega Shots
CIRCLE, TRIANGLE, TRIANGLE, SQUARE, X.

Rapid Firing
SQUARE, TRIANGLE, X, TRIANGLE, CIRCLE.

Bounces
CIRCLE, SQUARE, CIRCLE, TRIANGLE, X.