Here is the full list of all 12 Cubotrox achievements.
Earn 20 cubotroxes
Place 4 correct cubes in 2 seconds
Place 20 correct cubes consecutively
Complete 20 levels
Place 10 correct cubes consecutively
Complete 50 levels
Complete 100 levels
Earn 50 cubotroxes
Earn 100 cubotroxes
Place 30 correct cubes consecutively
Score points 10 times consecutively with the maximum multiplier
Score points 100 times with the maximum multiplier