Here is the full list of all 41 Cube Runner achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Finish all lvl-s.
Finish level 70
Activate 10 checkpoints.
Finigh level 60.
Finish 50 lvl-s.
Die 25 times.
Use gravity switch 50 times.
Die 20 times.
Activate 5 checkpoints.
Die 15 times.
Use direction switch 25 times.
Finish level 40
Finish level 30
Die 10 times.
Use gravity switch 25 times.
Use direction switch 10 times.
Finish 25 lvl-s.
Use gravity switch 20 times.
Use gravity switch 15 times.
Use switch 25 times.
Destroy 25 enemies that are blocking your path.
Finish level 20.
Use switch 20 times.
Die five times.
Use switch 15 times.
Use gravity switch 10 times.
Finish level 15.
Destroy 20 enemies that are blocking your path.
Destroy 15 enemies that are blocking your path.
Use switch 10 times.
Use switch 5 times.
Finish level 10.
Use gravity switch 5 times.
Destroy 10 enemies that are blocking your path.
Destroy 5 enemies that are blocking your path.
Finish all 6 tutorial lvl-s.
Die one time
Use switch first times.
Activate your first checkpoint.
Use gravity switch.
Destroy first enemy that is blocking your path.