Complete a puzzle with a 3-star ranking
Complete "The End?" stage with a 3-star ranking
Complete all the stages
Complete all stages with a 3-star ranking
Complete a puzzle in the snow with a 3-star ranking
Complete a puzzle in the sand with a 3-star ranking
Become looooong (76 joints or more)
Crawl onto a mine without any extra lives
Pick up 3 extra lives
Step through 10 wormholes
Eat 10 bombs
Push a boulder 10 times
Wear the top hat
Wear the santa hat
Wear the explorer hat
Wear the fedora
Wear the golden top hat
Complete "Trick or Treat" stage with a 3-star ranking