I think this game would have been much more fun for me if i could buy new ships or take over the flagship i just killed. Also the enemies being sucked towards you kinda made the hardest difficulty nearly impossible. If the upgrades were more balanced out, more ship models, a bit of a campaign, it would be AMAZING. Please make a Sequel.
For people who are having trouble with this game, remember the smallest unit has a lot of attack. So mix them in with the bigger units. As well as repeat earlier levels to get some experience and gain an upper hand on the latest level.
Your team AI gets better about mid-way through, although for your future games i would suggest a little bit better of a fighting system then just clicking on them over and over. Maybe different weapons can have longer reaches but hit slower ect. ect. Not every weapon feel the same but do more damage.
Got the card, that game was very fun, i don't see how you guys think its very hard, just jump around alot, and make sure to jump around when your low on health, they dont hit you very well at all. The boss was easier than ever. This game and card was more perfect than ever because cards should not be easy to get. It makes the game more fun with a challenge anyways