Beyond the Black Hole

For infinite health in this game, use the DOS utility DEBUG.
First backup your game to be edited, then type the following
from the DOS prompt:
ren bh.exe cheater.cht
debug
a 100
mov dx,es
add dx,1000
mov es,dx
g 108
r ip
100
n cheater.cht
l e es:50dc 90 90 90 90
Then type:
w q
Then rename CHEATER.CHT back to its previous name.