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.
Get the highest possible score on all levels.
Find ubb and make him king.
Bounce a Fin back and forth 10 times.
Collect all hidden crystals.
Fall through six different warps without landing.
Visit all regular and secret levels.
Make it to the party at the end of the game.
Finish a level without dying.
Get the highest possible score on a level.
Collect a hidden crystal.