Here is the full list of all 10 UFindO achievements.
Complete the tenth level with three stars.
Complete the ninth level with three stars.
Complete the eighth level with three stars.
Complete the seventh level with three stars.
Complete the sixth level with three stars.
Complete the fifth level with three stars.
Complete the fourth level with three stars.
Complete the third level with three stars.
Complete the second level with three stars.
Complete the first level with three stars.