Bombjack: hints/cheats

Collect 23 fizzling bombs for a massive 50,000 point bonus.  
Every so often a disk bearing the letter P arrives heralded by
a siren sound; collecting this immobilises the enemies and turns
them into smiling faces which can be collected for more points.
An E disk adds an extra life, while a B adds points and increases
the value of subsequent bombs collected.

POKE 49984,0 for infinite lives