Here is the full list of all 16 Zombillie achievements.
Squash 100 zombies
Finish 5 levels without using the clock
Complete 5 levels within maximum time
Collect all possible hearts in the whole episode
Use the clock 10 times in one level
Use the cleaver 10 times in one level
Complete 3 levels in a row without restarting or going back to menu
Forcefully enter the one way path 5 times in one level using the beacon light
Use 3 distinct hammers on 3 distinct chipped walls in one level
Make 10 turns on oil slick in one level
Complete the whole episode with 3 stars in every level
Use the teleport 20 times in one level
Guide Zombillie through 4 differently coloured teleports at the same time
Finish the game
Complete the whole game with 3 stars in every level
Cut Zobillie into 4 pieces