Similar to BulletML games like rRootage, Warning Forever is a pretty little shooter game. The interesting thing here is the articulation of the autogenerated bossed. Funky graphics, fresh and simple.
The site's in Japanese. Poetic automatic translation:
Boss rearing vertical scroll shooting. The boss it comes out. When it pushes down, it becomes strong. Keep exceeding we. Pleasure of destruction. Excessive explosion. Labor is not spent to drawing the picture (because you grow tired).
As seen on Twysted