Here is the full list of all 22 Little Adventure on the Prairie trophies - there are 6 bronze, 8 silver, 7 gold and 1 platinum.
Obtain all trophies
Complete Stage 1
Complete Stage 2
Complete Stage 3
Complete Level 1
Complete Level 2
Complete Level 3
Complete Level 4
Complete Level 5
Complete Level 6
Complete Level 7
Complete Level 8
Complete Level 9
Complete Level 10
Complete Level 11
Complete Level 12
Collect your first Attack Power Up
Raise your Attack power to 2x
Raise your Attack power to 3x
Collect your first Defensive Shield
Raise your Defensive Shield to 2x
Raise your Defensive Shield to 3x