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