Here is the full list of all 10 ibb & obb achievements. It takes around 10-12 hours to unlock all of the achievements on Windows.
Collect all hidden crystals.
Get the highest possible score on all levels.
Make it to the party at the end of the game.
Visit all regular and secret levels.
Find ubb and make him king.
Bounce a Fin back and forth 10 times.
Finish a level without dying.
Fall through six different warps without landing.
Get the highest possible score on a level.
Collect a hidden crystal.