Here are some cheats and tips for the game Aquanoid.
Level select:
Enter NZHF[level number] as a password.
Level Password
10 CERTIFICATE
20 GYPSUM
30 LEVIATHAN
40 PREDECESSOR
50 SKELETON
60 VULTURE
70 FREQUENCY
80 BUCCANEER
90 TRADITION
100 REFLEX
110 AFFLUENCE
120 HOSTAGE
130 MEMORIAL
140 ZODIAC