I think "epic" should mean more than just "long". Sitting, doing nothing for 15 minutes while enemy units die isn't much fun. Taking 30 minutes to kill a boss is boring. Over all, this game lacks "fun" and "skill", two essential parts of a good game.
Got theCard and the "Zealous Palace Defender Badge" and the "in game" stats say I've killed over 2000, but I still don't have the easy badge! For some reason it thinks I've only killed 64.
This, and for all the other reasons other people have said, 1/5.
crazy small font. Could never see how many bullets I had.
bad interface. cursor goes off edge of screen, sometimes space to continue, sometimes click.
OK game, but no re-playability