Galactix

This is a nice shoot-em up and it's absolutely free !

What more could you possibly want ?
Oh.... a cheat....

Invulnerability ?
May be unlimited ammo too ?

You got it !

It wasn't simple....but we got the job done.
(As always)

The only thing you need to do is uncompress the executable using something like UNP. (Information from Cheat Machine)