For infinite lives in this game, use the DOS utility DEBUG. First backup
your game, then type the following from the DOS prompt:

For CGA game:
ren cga.ovr cheater.cht
debug cheater.cht
For infinite lives, type:
e 2abe 90 90
For infinite bombs, type:
e 2083 90 90 90 90
Then type:
w
q

For EGA game:
ren ega.ovr cheater.cht
debug cheater.cht
For infinite lives, type:
e 2f39 90 90
For infinite bombs, type:
e 24a2 90 90 90 90
Then type:
w
q

For [TGA] game:
ren tga.ovr cheater.cht
debug cheater.cht
For infinite lives, type:
e 2e2b 90 90
for infinite bombs, type:
e 2281 90 90 90 90
Then type:
w
q

Then rename CHEATER.CHT back to its previous name