Sloppy, rough, and shoddy, like a used tank.
I think I get what the author was going for, here. First of all, ignore the fast, light-armored fighter. She's a waste of skin. What you want is the big honkin' tank.
This isn't a curtain-fire game about weaving between enemy shots. It's not even a game like Einhander where your ability to grab, wield, and maintain the right weapons loadout is key to success. This is just a balls-to-the-wall merc run. Your objective is to dish out more damage than you receive, so you can auger your pock-marked, smoking gunship into a health powerup just before your hull comes apart at the seams.
Unfortunately, it's very difficult to get into that mindset, although the rough & gritty graphics and sounds are a hint. The risk/reward schedules here are quite different from the shooters you may be used to. Getting shot all to hell isn't a risk so much as a fact of life.
I suppose if you can master the fiddly little split-second shield, you could block a lot of shots, but if you don't have great timing skills, you'll need to develop them. I'm not a DDR or Guitar Hero player, myself, so I couldn't hack it, and this game *really* put me in the mood for a standard sh'mup.
I might come back to this later if I'm bored and take another crack at it. But really, it's just a totally different game than the genre conventions would suggest. This is not a traditional Sh'mup. This is a damage-soaking sh'mup. You're flying a tank in every respect. Try to keep that in mind.