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