Revenge for Asgaroth!

Your planet has been destroyed by alien invaders. Now its payback time. Never forget, never forgive! Shoot down the alien space ships, but beware of enemies and obstacles. How fast can you clear the planet? Prototype !! Revenge for Asgaroth is a prototype still in development, without menus or scoreboard, but already playable. To exit the game close the window! Feedback very welcome !!