No fun with that stupid AI! It should shot on vertical and diagonal also... Actually a good game, but gets repetitive at least to the lvl I got. Firing on the wrong side doesnt happen too often, one annoying thing though is my ship not getting to the upper side of the screen.
I took all towns and nothing happened. It should have a story, other kinds of missions etc. By the way, I got lvl 44 with 600k, and by the last half of the game my lines were invincible.