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 3
Complete Level 12
Raise your Defensive Shield to 3x
Complete Level 11
Complete Level 10
Complete Level 9
Complete Stage 2
Complete Level 8
Complete Level 7
Complete Level 6
Complete Level 5
Raise your Defensive Shield to 2x
Collect your first Defensive Shield
Complete Stage 1
Complete Level 1
Complete Level 4
Raise your Attack power to 3x
Complete Level 3
Raise your Attack power to 2x
Collect your first Attack Power Up
Complete Level 2