Try again
There needs to be more to a shmup than just mindless shooting.
From what you tell me in your description is that you really didn't create any of this what-so-ever other than to have the game running. I know it's from the Game Factory but I'd expect you to have created something of original quality than just slapping in music, sprites and the like. The background of the solar system is also incredibly generic with just some dots randomly plotted in the canvas which doesn't even move. So who's going towards who, you or them? The score system goes up by ten points a hit, so I'll need to be playing this game for at least a good hour to beat 'John' hopefully before my thumb gets numb from just jamming the laser if two or occasionally four will pop up on my screen. Nothing is really fun nor is it appealing to look at.
Take my advice and try to create some original art assets next time you decide to create something of a shump or just in general.