graphics bug...
when the opponents card is not yet revealed, the arrow on the right that indicates it can be turned over is simply a half circle - the part that has the arrow that is normally on top of the card is missing.
Just played a game where both characters were invisible to my opponent (a noob) to start. They became visible to him at different times. He then became invisible to me at the end of the game and I to him - but our own characters were visible to each other.
No time for love Dr. Jones!
didn't manage to flag it, but got a bug where I was fighting someone who was playing andromeda and she was invisible, as in the card was there and I was playing her, but the character didn't show on the battlefield.
1st boss is quite easy if you just upgrade your armour 3 times he is no longer a one hit kill.
And if you can't get him by the second time, try getting regeneration for your buildings.
If you can't get him by the third pass, you should go back to doing whatever work you're avoiding - this game ain't your friend