Visuals are cool as hell, everything, characters, enviroment, animations, particles. Everything is on top.
Gamedesign is pretty basic but with it's feature: paired effects which I've only seen in Shotgun king. Some of effects are really valuable and change gameplay, both positive (such as immunity to melee/ranged damage) and negative (inverting controls).
Technical condition is okay but there was one major bug on the screenshot: upgrade cards just scew on click and cannot click them anymore. One all three cards bugged, you're doomed because upgrade doesn't pause the game (which is also a big problem)