References and inspirations

http://inspacewebrawl.wikia.com/

http://shmuptheory.blogspot.fr/2010/02/anatomy-of-shmup.html

Senko no ronde

Accelaration of suguri

Change Air blade

-Easy-to-master controls

Volley fire

http://kotaku.com/5955855/the-ten-commandments-of-video-game-menus