Bug: Cannot buy tyrant pack when level two. The game allows me to click buy, then says that it requires me to be level two. It then takes the gold that I tried to spend on that pack, without giving me any of the cards.
I love the concept behind the game, and it's got great potential, but... seeing my numerically superior squadron of Spitfires get shot down in droves by a few Ju-87s is... disheartening, to say the least. As has been said, the airplane ability advantage should be clearly in the favour of the British, as even the stellar Bf-109 did poorly in the actual Battle of Britain due to lack of fuel for dogfighting. Not that I'd necessarily agree that the Bf-109 (or the under appreciated Fw-190) was better than a Spitfire or Hurricane even on equal ground, to say nothing of Spitfires and Hurricanes being shot down in large numbers by bombers, particularly Ju-87s (It would be like said Bf-109s or Fw-190s being slaughtered by Fairey Battles).
So, to sum up: British planes should be stronger, but pretty well outnumbered. I want a sense of my brave pilots and civilians struggling on heroically in the face of grim odds, not the sense of "Wow, my planes are terrible."
In the meantime, Achtung Spitfire!
 "Tyrant"){kind=icon}
 "Space is Key"){kind=icon}
 "Spitfire: 1940"){kind=icon}