Windowkill is a clever multi-window twin-stick shooter that moves around your screen
www.gamingonlinux.com
This might be one of the most unique games I've ever played. Windowkill from torcado just released on Steam with Native Linux support and its use of multiple moving windows really changes the bullet-hell genre.

Io non avevo mai visto una roba del genere. Lo voglio ai TGA di quest’anno, anche solo per l’idea.