1943

Super password 
Enter TY19U as a password to start on the last level with maximum offense, defense, weapons, energy, and time. 

Weapon power-up 
Hold B until a beep is heard. Release B to release a more powerful shot. 

Level Password 
2 73Q17 
3 E3QG3 
4 L3QG3 
5 S3QG3 
6 Z3QG3 
7 I3QG3 
8 P3QG3 
9 W3QG3 
10 33QG3 
11 A3QG3 
12 H3QG3 
13 U3QG3 
14 53QG3 
15 K3QG3 
16 F3QG3 
17 13QG3 
18 63QG3 
19 83QG3 
20 D3QG3 
21 M3QG3 
22 R3QG3 
23 TY2NU