Here are some cheats and tips for the game Thundercade.
GXVYPZVI Infinite lives
PAOYIILA Start with 1 life
TAOYIILA Start with 6 lives
PAOYIILE Start with 9 lives
AAUNLIPP Infinite missiles
GZXYZTVI Infinite bombs
TENNPZLA Start with double bombs
PENNPZLE Start with triple bombs
ZANYGSZA Autofire!