Here is the full list of all 13 Chunky Tomato Demo achievements.
You have collected 20 blue juice drops to improve stamina.
You've stepped in a cigarette butt 20 times.
You've been run over enough times to make a family pizza.
You have collected 20 orange juice drops to shorten the cooldown for jumping.
You have collected 20 booster drops.
You have collected 5 drops within 10 seconds.
You've stepped in broken glass 20 times.
You've run through nails 20 times.
Stick to a piece of chewing gum 20 times.
Get stuck on a piece of chewing gum and get run over by a car while in a daze.
Successfully complete 5 levels and earn 3 stars each.
Complete the first level successfully.
Become a chunky tomato.