Here is the full list of all 20 Swingin Swiggins achievements.
Beat Level 20
Beat Level 19
Beat Level 18
Beat Level 17
Beat Level 16
Beat Level 15
Beat Level 14
Beat Level 13
Beat Level 12
Beat Level 11
Finish last level in the city
Beat Level 9
Beat Level 8
Beat Level 7
Beat Level 6
Beat Level 5
Beat Level 4
Beat Level 3
Beat Level 2
Beat Level 1