Here is the full list of all 34 Aqua Kitty - there are Milk Mine Defender achievements.
Reach wave 10 of Infinite Espresso in Normal Mode.
Complete all levels in Normal Mode.
Reach a maximum chain bonus of 99.
Destroy 100 Mouthfish!
Lose too many of those cute milk miners.
Destroy 40 Super Dodgers!
Destroy 250 Craboids!
Destroy 180 Puffabooms!
Destroy 100 Angelfishies!
Destroy 20 Super Paleofish!
Rescue 100 miners from being abducted.
Destroy 200 Jellygrabs!
Destroy 150 Dodgers!
Destroy 60 Nautilus!
Destroy 80 Paleofish!
Save all the mining kittens in Easy Mode.
Save all the mining kittens in Normal Mode.
Save all the mining kittens in Arcade Mode.
Complete level 11 without turning in Normal Mode.
Reach wave 10 of Infinite Espresso in Easy Mode.
Reach wave 15 of Infinite Espresso in Easy Mode.
Reach wave 20 of Infinite Espresso in Easy Mode.
Reach wave 30 of Infinite Espresso in Easy Mode.
Complete all levels in Easy Mode.
Complete all levels in Arcade Mode.
Beat the Boss on Easy Mode in under 3 minutes.
Beat the Boss on Normal Mode in under 3 minutes.
Beat the Boss on Arcade Mode in under 3 minutes.
Have all three directional pickups active at once.
Player 1 max out all shop items in Arcade Mode.
Chain 3 bombs in under 2 seconds.
Go crazy and destroy 20 enemies in an exceedingly short period of time.
Reach wave 15 of Infinite Espresso in Normal Mode.
Reach wave 20 of Infinite Espresso in Normal Mode.