[ajnin]

Good old shmup, that's a genre that is sadly fallen into disfavour these days.

I played a bit however after 2 minutes or so some enemy ships get stuck going in a square pattern across the edge of the screen where they are impossible to hit and the game stops progressing. I refreshed once and got the same issue after a few minutes (Firefox).

[victorNicollet]

The square pattern enemies are a bug (well, level design mistake) back from 2004, where they would move outside the range of the laser but would still be within reach of other weapons.

I must admit, since I no longer have access to the level editor, I edit the level files with HxD :-)

[ASalazarMX]

It's still alive today, but it's not called "Shoot 'em up" anymore.

These days it's been taken to extremes (signs of the times?) and called "Bullet Heaven" (you exterminate hordes of wimpy enemies) or "Bullet Hell" (you evade myriads of bullets).