Okay, I really enjoyed this shooter. It has 10 campaign levels, a final boss, a survival mode and even a kill count to help those who are trying to get the medals. There's not much that can be suggested to add or change. Maybe a clearer layout, since it wasn't until the 4th time playing the 3rd level that I noticed there are upgrades (I was already planning to suggest to add upgrades, I would have looked like a fool lol).
Also the final boss was short and intense (I'm not 100% sure but I think I'd have enjoyed more a longer battle).
All that said, great game.