Far too easy, a demo with many flaws
You shouldn't have submitted this as it isn't the finished version and I feel that demos/trailers don't deserve to be submitted to Newgrounds as they are not the finished version, you should wait until you finish something before deciding to submit it.
Demo/Trailer rant over.
It needed a lot of work, I sucked at it and failed to hit the ships quite frequently in the first part, however because it was so easy I managed to complete it. When you had to destroy the three ships at the start it was annoying and took a while because they kept going off-screen for ages and when you'd destroyed all but one you had to sit there waiting for ages to be able to destroy it. The boss was too easy and was even easier than the non-bosses as it was really big and was too easy to just hit everytime. You should have been able to dodge the enemy fire or something as well as it would ahve amde the game more fun. Some background music wouldn't have gone amiss in this game and the sound effects you did have in the game were really annoying.