Gunhed,
a.k.a. Blazing Lazers, has the complete shootemup package deal:
good music, challenging game play, nine levels which won't allow
you to beat this one in a couple days.
Gunhed has the classic "button I shot, button II bomb" setup, with
a choice of four main weapons, identified by roman numerals. There
is even a (weak sounding) voice over when picking up the weapons:
I for boring old, normal shot, II for wave, III for a twisting lightning
like shot-very cool, and IV for a very useless bubble ring type
shot.
Grabbing purple orbs power up whatever weapon system you are using.
Bombs are very, very plentiful, and you can hold up to 16 total:
don't be afraid to use them. There is also the flashing icon, like
in Super Star Soldier, which allows a dead player to start up exactly
where the ship met the untimely demise.
I loved the bubble level too...the music gets very funky, the graphics
are colorful, and zillions of bubbles flood the screen...(every
true shooter must have a bubble level and an 'attack the battleship'
level).
My only problem with Gunhed is that is last level is very tough.
If and when you beat this one, you feel as if you really accomplished
something!