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