I love how the game looks: cards spinning around, so many enemies and projectiles. Background looks nice too. The UI is clear, there is all necessary information and I immediately understood how to play.
As for the game itself, it's fun but I didn't really feel like my actions have a lot of weight. I just used cards whenever I got them and won eventually.
Maybe the game would be more strategic if each card could be used differently. For example, with one card you either recharge your shield or bomb the enemies. Another card would be either shoot forward or shoot backwards, etc.