Not too bad, but there are many things that you should make better:
*Make the boss fights more "fair", I always have to sacrifice lives in order to have a chance to damage the boss.
*Add a moving animation, I have the feeling that all the people in this game are ghosts
*Improve the graphics a little bit

I really think this has potential. With that being said this needs quite a bit of work. Find an artist who you can collaborate with that can help you out. Try and find someone who wants to get their name out there. I really didn't mind the art though. It has a certain charm to it. I love the intro screen. The flashing "PRESS ENTER TO PLAY" is awesome. That and the font of the whole screen remind me of an old Nintendo or arcade game. I also see that the final level took some influence from space invaders. <spoiler>The boss is bigfoot? I kinda see a hint of bigfoot. Not a big deal just funny is all. </spoiler> Gameplay isn't bad. It's a shoot and hope for the best type of thing. There really isn't too much of a strategy to it. Maybe a little in the boss levels. The thirty something lives in the second level I thought was overkill. Then I played it. Turns out you really do need thirty something lives. Good game overall. Like I said before it has a lot of potential. I would love to see some more games from you in the near future. Keep it up!

It's surprisingly not a bad game at all. However, it is incredibly and brutally difficult and wayyy too easy to die. I'm not saying make it super easy, but atleast make it a little less difficult.

The graphics They are poorly made and the way changes and the way it changes is silly!

NO... JUST NO IT IS A STUPID GAME WITH NO SOUL