Time to ! PANIC !
Great job!! It is a very good game, and I wish there were more games like this out there, and more people like you taking the initiative to help people pursue games. Please create more like this, and continue the good work.
As for Constructive criticism, I agree with jackp0t and his comment on adding cosmetics. The addition of new starships, guns, and maybe coins would be great and improve the game to a WHOLE new level. Also, the slo-mo doesn't work.
Again, great job! Keep up the good work!