Really superb twin stick shooter. Evokes the feel of some classic Amiga games. I'm a fan of bullet hell shooters so some of the screens really scratched that itch for me, but there is plenty of variety for any shooter fan I think. Great soundtrack too if you're a fan of chiptunes.
If you put Cybernoid / robotron / and a few other shooters into a pot and mixed them, it would look something like this.
Without a doubt worth the asking price!