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