I got a chance to play now! Happy you were able to get it re-uploaded.
Overall I really enjoyed the game. I especially like how even by using simple shapes you were able to achieve some diversity in enemies. Effects such as Vignette and Screen Shake are also always a plus! If I were to add some criticism, I would really like to be able to hold the mouse down to fire at a steady speed, as the timing felt a little cumbersome. Other than that, I'm sure with more time you could add more and more to just add to the overall feel of the game (enemy types, animations, etc).
Once again, I really enjoyed the game! Good job!