Pick Level
On the load/save screen push Square, Up, R1, Triangle,
Down, Select and choose a starting level under the normal
difficulty setting. Press R1(2), L1(2), Square, Left,
Triangle, Circle at that screen to choose a starting level under
the hard difficulty level. Note: Only previously completed levels may be
accessed.
Extra Shop Items
At the shop screen press R1, Down, L1, Up, Square,
X
Super Secret Shop
With cursor on buy, "R1, up, left, L1, Up, L1, Square, X."
You'll hear a explosion. Enter
Buy and everything will be available.