Excellent game. There are lots of games obviously inspired by StS, and this is better than most I've played. The art is a little generic (AI I assume) but nice enough.
A couple of minor points - I did find the status markers (poison, strength etc) a bit hard to read. The symbols are very small and can get a bit lost in the character art. The numbers also tend to disappear into the background in snowy scenes. I 'd also like to see larger text generally, the tooltips are in a very small font.
Overall this is very good. The basic mechanics are not especially original, but are fairly well balanced and implemented. A solid, fun deckbuilder that I can see myself playing a good deal of.