Here is the full list of all 16 The Wizards Who Fell In A Hole achievements.
Find the elusive Battenberg
Complete the game
Score a million points
Eat 2500 pieces of food
Kill 2500 monsters
Collect 100 special items
Collect each type of special item
Eat 1000 pieces of food
Get half way through the game
Kill 1000 monsters
Collect 50 special items
Kill 500 monsters
Eat 500 pieces of food
Eat 250 pieces of food
Defeat your first boss
Complete your first level