Here is the full list of all 32 Crumble achievements.
Win all the stars of the main levels
Finish any level without using your jump
Roll for 10Km
Make 100 tiny mushrooms fart
Unlock half the skins
Collect half the blobs
Complete the main levels
Finish the 5th world
Jump 2000 times
Win half the stars
Finish the 4th world
Roll for 5Km
Finish the 3rd world
Get directly hit by a cannonball
Unlock your first skin
Finish any level without using your tongue
Jump 1000 times
Finish any level in less than 30 seconds
Leave the orbit in the hub world
Finish the 2nd world
Finish the 1st world
Roll for 1Km
Reach maximum top speed
Win your first star
Jump 100 times
Collect your first blob
Fall through the fog for the first time
Complete all the levels including optional levels
Win all the stars of the optional levels
Win all the stars
Collect all the 21 blobs
Unlock all the skins