Here is the full list of all 23 Janken Cards achievements.
Win 10 games
Play 1 hour
Unlock all avatars
Win a Tournament
Win one game
Complete Adventure
Win a game by points
Win a game by columns
Win by 1000 points
Win 3:0 colums
Win 5:0 columns
Win 100 games
Win 500 games
Play 10 hours
Play 50 hours
Complete 10 Adventures
Complete 50 Adventures
Win 10 Tournaments
Win 50 Tournaments
Complete Adventure withou loosing a life
Win by 10'000 points
Score 15'000 points
Win by 5'000 points