Here is the full list of all 24 Snik achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Get 3-stars for level 21.
Get 3-stars for level 22.
Get 3-stars for level 23.
Get 3-stars for level 24.
Get 3-stars for level 11.
Get 3-stars for level 12.
Get 3-stars for level 13.
Get 3-stars for level 14.
Get 3-stars for level 15.
Get 3-stars for level 16.
Get 3-stars for level 17.
Get 3-stars for level 18.
Get 3-stars for level 19.
Get 3-stars for level 20.
Get 3-stars for level 6.
Get 3-stars for level 7.
Get 3-stars for level 8.
Get 3-stars for level 9.
Get 3-stars for level 10.
Get 3-stars for level 3.
Get 3-stars for level 4.
Get 3-stars for level 5.
Get 3-stars for level 2.
Get 3-stars for level 1.