Hold the following buttons before the corresponding level begins to start with a special weapon.

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