To get full shields and a death ray, just press backspace at any point in the
game, registered version only. Unfortunatly, you lose all your money. To skip
to any level, go to the sector screen and hit Z for Bravo sector, X for Tango
sector, and Y for Other Regions. Then, push the following keys to select the
level you want to play -
Q for Level 1
W for Level 2
E for Level 3
R for Level4
T for Level 5
Y for Level 6
U for Level 7
I for Level 8
O for Level 9