Here is the full list of all 66 illie achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Unlock Level 60
Unlock Level 59
Unlock Level 58
Unlock Level 57
Unlock Level 56
Unlock Level 55
Unlock Level 54
Unlock Level 53
Unlock Level 52
Unlock Level 51
Unlock Level 50
Unlock Level 49
Unlock Level 48
Unlock Level 47
Unlock Level 46
Unlock Level 45
Unlock Level 44
Unlock Level 43
Unlock Level 42
Unlock Level 41
Unlock Level 40
Unlock Level 39
Unlock Level 38
Unlock Level 37
Unlock Level 36
Do 2000 steps
Unlock Level 35
Unlock Level 34
Unlock Level 33
Unlock Level 32
Unlock Level 31
Collect 250 coins
Unlock Level 30
Unlock Level 29
Unlock Level 28
Unlock Level 27
Unlock Level 26
Do 1000 steps
Unlock Level 25
Unlock Level 24
Unlock Level 23
Unlock Level 22
Unlock Level 21
Unlock Level 20
Unlock Level 19
Unlock Level 18
Unlock Level 17
Unlock Level 16
Unlock Level 15
Unlock Level 14
Collect 100 coins
Unlock Level 13
Unlock Level 12
Unlock Level 11
Unlock Level 10
Unlock Level 9
Unlock Level 8
Unlock Level 7
Unlock Level 6
Do 100 steps
Unlock Level 5
Unlock Level 4
Unlock level 3
Unlock level 2
Collect first coin
Do first step