Here is the full list of all 13 HardCube achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Complete Sci-Fi
Complete all levels
Get killed by lazer
Complete Winter
Fall down after wind blow
Complete Western
Comlete level less than 10 seconds
Fall more than 15 times on one level
Fall more than 10 times on one level
Collect all umbrella at one level
Complete Fling Islands
Don't fall after mine explosion
Complete Tutorial