Here is the full list of all 12 Bouldeurdache achievements.
Beat the last level and watch the credits
Dig 30000 dirt blocks
Make 100 amoeba turn solid as a diamond at once
Make amoeba turn solid as a rock
Play the OMG turbo mode
Collect 1000 diamonds
Reach a total of 9 lives
Trigger a magic wall
Make amoeba turn solid as a diamond
Die for the 1st time
Turn a butterfly into diamonds
Collect a diamond