Eets Munchies had Steam trading card support added on June 11, 2014. There are 6 cards in the series, 3 of which you'll receive for purchasing and playing the game.
Trading Cards
Foil Cards
Badges
Level 1
Ice Cream
Ice Cream
Level 2
Jello
Jello
Level 3
Lollipop
Lollipop
Level 4
Pie
Pie
Level 5
Sundae
Sundae
Booster Pack
Emoticons
Profile Backgrounds