Very good Arcade Shooter. It is not easy, but also not insanely hardcore difficult. Important thing is to understand that at the start of the game you will have 2 continues and 1 shield... and my bet is your reaction will be like mines (WTF are they insane? o_O) but as it turns out you will earn more continues and shield for your scores. It means you will be repeating many levels over and over but as it may sound boring, it isn't. After every time you will repeat a level you will learn how to make it through it with minimum harm and you will feel wild satisfaction when you will finish a level without getting hit even once.
The graphics are simple but they look great still, the blasts and projectiles look very nice and you screen is filled with explosions and other stuff it can look amazing sometimes. Like I said it is difficult, but not impossible to beat, game and if you are a gamer who can turn his frustration into motivation, then this game will give you a good couple of hours of pure joy and mayhem along with delightful pride as you will notice how better and better you get every time you repear a level and finish it with a better score.
I am not a hardcore fan of this type of games, and the fact that it got me hooked proves how hell of a good game this is.