Endurance mode has a nice twist at the end, but the difficulty lacks. I finished it on my second play through, and can imagine plenty of people doing it in 3 or maybe 4 tops.
No card, no badge. To top it off, the game is quite boring. I cannot recommend this game to anyone, not even for the rewards as they simply don't register.
The game is rather bad actually, and only fun to get the first badge. Getting the other one is a test of patience, not because of the steep curve of difficulty but more so due to the overall level of boredom.