Level select:

Press L1, Circle, L1(3), Circle(4), L1(2), Circle(2), L1, Circle, L1, Circle(4). Press R1 or R2 to select a level.
Ammunition refill:

Press Circle(4), L1, Circle, L1(2), Circle, L1(2), Circle, L1(4)
Restore energy:

Press Circle, L1(3), Circle, L1, Circle(2), L1, Circle(3), L1(5), Circle(2), L1