Fairly addictive
I am proud to be the first person to review this game. I think it actually has a good chance of winning Daily Feature, you know. What makes this game fun is that there is such a wide variety of enemies to shoot at and it goes on so long. It got a bit confusing at times, like with how you could not collect some of the powerups at times. It's still a great game because it has some really cool music and a great sense of adventure. The backgrounds are different in most levels encouraging you to move forward.
The best thing is probably the easy controls. With the upgrades especially, you have so much mobility to go anywhere you need to. Some of the upgrades appear to be automatic while others you have to pause the game. You can get a really clear view of everything around you and what is coming towards you. I don't think I played the original.