Kind of shit unfortunately. Doesn't really have anything to it other than rather awful and unnatural stage layouts. The version I played also sounds like shit, which doesn't really help. It's a bit annoying because I remember hearing quite good things about this, at least the few times I heard about it at all.
Played the NES version. This is one of the most faithful arcade-to-NES conversions and is one of the better 2D shooter platform games on the system...provided you're only playing to have fun and you're not actually making a serious attempt to beat this game. The first 2/3rds of this game are delightful; the last 1/3rd of this game hates you and your family and will make this fact known with every spike and enemy placement.