Gotta catch 'em all! I like the spooky ghost emoticon, but I'm biased. Aside from cards, a new patch has gone live that improves the game over screen to be of the same quality as the rest of the game.
Day 2 Patch: Leaderboard support and various fixes.
Leaderboards!
Now, after beating a level, you can compare your completion time with the rest of the world! Pressing Y on the controller or C on the keyboard on a level's door will bring up a leaderboard tailored to your current difficulty.
Bug fixes:
Replaced Xbox controller plugin. Should work for everyone now.
Achievements now pop up immediately, not on closing the game.