Could have been a spectacular exclusive shoot'em up if it wasn't for the increased difficulty. Unique ability grabbing mechanic allows you take use of enemies weapons. Changing your ship move speed frequently is essential for defeating bosses and navigating certain stages, that's why it is mapped to button A (instead of select for example). An overall difficult shooter, but in a totally different way where reflex and bullet recognition isn't the factor but recognizing deceptively placed pattern order and navigating though a AI that predicts your last ship placement is. Things are not as they seem, before you progress the scrolling screen wait for a traps to be released on several stages.

An HCG101 article describes it the best "... enemy locations and firing patterns are not fixed but based upon player position, meaning the game constantly adapts and is almost procedurally generated. You can’t simply memorize their locations, you need to be ready to adapt with them. In conjunction with this, speed changing is essential."