Masterpiece.
This is the masterpiece of Newgrounds. Without this game, Newgrounds wouldn't be as popular as it was today. Yes, this game is pretty hard, but it is possible to beat. I lol'd when he bit the FBI guy's head off XD.
The first boss is easy to beat once you know how. Just stay on the top platform until the ray blasts, and jump when the robot dude jumps toward you. And when the ray does blast, get on the floor and shoot him until the ray comes back down to you, and jump back up when it does. Keep doing that and you will beat him :D.
And then on the helicopter part, just shoot up at it and avoid the missles. Easy, right?
And how to beat the final boss, just shoot his head until he dies.
If you don't understand what I just told you, search on YouTube "Alien hominid walkthrough," and look for the right one.
By the way, there's a way to get an extra life. There's a 1-up on the top of the first building :D.
Hope this review helps you all.