Here is the full list of all 16 Flipon achievements.
Complete the bonus levels
Read the credits. Entirely. It's important for the people who makes game to be properly credited.
Defeat the Golden Phoeniux
Defeat the greed pyramid
Wins all encounters with Piratou
Defeat Loméo
Complete a challenge level
Defeat MadMatik
Chains 10 combos with a single action
Complete a puzzle level
Defeat the Space Sheriff
Reach a x30 multiplier
Reach a x20 multiplier
Complete a survival level
Complete an objective level
Reach a x10 multiplier