Shmups or shoot 'em ups for the uninitiated is one of the oldest video game genres there is. Examples of Shmups are Space Invaders, Gradius, R-type, Galaga, etc..
This type of game tests not only your hand-eye coordination but also your reflexes. It's like driving a car (but in this case a spaceship or a plane) while avoiding obstacles and projectiles along the way.
I suck at Shmups. I've never been really good with Shmups, but I did finish Gradius 3 (Snes) and R-type 1 & 2 (Gameboy Color). But this game I'm playing just now, Alpha Wing, for mobile phones--I just can't get past the second level. Considering that autofire is on and the controls do not really suck that much than a GBC, I can't get past the second level.
I'll try to play it again after work. Man, work just gets in the way of everything fun.