I like the style and the audio of this game. However, I don't see anything happen when "shooting" - the enemies don't die and there is no other feedback for me. Maybe I am doing something wrong, but because of this I am only able to run away from the enemies - which is not so funny for me. I don't know if this is a bug or I am just doing something wrong. Additionally, I don't really know what to do with the pickups :/
But, with some polishing and explanation - I think this could become a quite nice game :)