best looking not that much, but very special and typical irem style
anyway one of the upperclass shmups for sure!
and yes, it's damn hard as hell. the first levels aren't that though, but it increases fast. and irems typical memorizing is required like never before.
for get into the last stage a average of 80% enemy-destruction have to be reached over the previous levels. else you will drop into the 10x harder penalty level, which you never will escape unless pushing "run + sel" or a power off!