Interesting game with awkward controls and a bad UI. Simple as that. I didn't even know what to do initially because you have to click a basically unlabeled menu to see the controls (white on grey is hard to see). There's not a lot of warning about what the boss will do, and compound that with the awkward controls and I died pretty quickly. Also, the gun pointer thing's center is matched to the tip, and disappears when it touches the edge, so any time I try to click something in a corner, it just reverted back to the default pointer. There's just so many little bugs everywhere.
Also it's generally not a good idea to start the game by insulting the user, especially if you know the reaction might not be positive because of the state of the game. If the demo is playable (this is, barely), then you can put it up on Newgrounds. However, you generally want to put more polished and finished projects on the site. This would have majorly benefitted from playtesters and bugfixing.
All in all, it's an okay game that needs more work before it can be considered good or great.
P.S. I also saw your tag spam on Scratch. I'm glad you didn't do that here, but you really shouldn't do that anywhere. It just feels a little scummy to me.