Here is the full list of all 27 Kill The Plumber achievements.
Beat level 108.
Beat level 96.
Kill the plumber on level 23 before the timer runs out.
Beat level 10 without jumping.
Get 108 stars in map 2.
Beat level 84.
Beat level 72.
Beat level 60.
Kill the plumber 100 times.
Beat level 48.
Beat level 36.
Get 108 stars in map 1.
Kill the plumber in level 4.
Beat level 24.
Beat level 12.
Beat level 11 in under 6 seconds
Kill the plumber 9 times.
Get stomped on level 1
Beat level 120.
Beat level 132.
Beat level 144.
Get 108 stars in map 3.
Kill the plumber 250 times.
Beat speedrun 1 in under 4 minutes.
Beat speedrun 2 in under 5 minutes.
Beat speedrun 3 in under 6 minutes.
Get all 432 stars.