Special weapons (1943):
Hold the following buttons before the indicated level begins.

Level	Code
1	Down
2	A
3	Up/Right + A + B
4	Down/Left + B
5	A
6	Left
7	Up/Left
8	Left + A + B
9	Down/Right + A + B
10	Up/RIght + B
11	Up/Left
12	Right + A+ B
13	Up
14	Up/Left + A + B
15	Down/Left + A
16	Right + A