Pros: This is the most polished game I've played so far. It feels like a finished mobile game which is very impressive for a 3 day jam. The gameplay is great, the aesthetics are great, the sound is decent and it fits fairly well with the theme. With a bit more content, I could see myself playing this for hours.
Cons: As I said, it could do with a bit more content, some more enemy types, some more interesting layouts, maybe some more skill mechanics as MechaKondor said. Apart from that, I don't know what else to say. It's a really well-made, solid game.