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