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.
Activate 5 checkpoints.
Finish level 40
Finish level 30
Use gravity switch 50 times.
Use direction switch 25 times.
Finish 25 lvl-s.
Use gravity switch 25 times.
Use gravity switch 20 times.
Use gravity switch 15 times.
Use direction switch 10 times.
Finish level 20.
Die 25 times.
Use switch 25 times.
Finish level 15.
Use gravity switch 10 times.
Use switch 20 times.
Die 20 times.
Use switch 15 times.
Use switch 10 times.
Die 15 times.
Destroy 25 enemies that are blocking your path.
Die 10 times.
Destroy 20 enemies that are blocking your path.
Finish level 10.
Use switch 5 times.
Die five times.
Destroy 15 enemies that are blocking your path.
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.
Use switch first times.
Activate your first checkpoint.
Use gravity switch.
Destroy first enemy that is blocking your path.
Die one time