Here is the full list of all 20 Platform Golf achievements.
Collect 2 gems in 1 Level
Hit any mushroom 5 times in one level
Collect 8 Coins in 1 Level
Hit the top of any level
Reach level 10.
Finish a level with 8 hits left.
Hit a Tree 5 Times in one Level
Fall into the water
Finish any Level with one shot
Finish any level in under 12 seconds
Get to Level 21
Reach Level 30
Reach level 42
Clear all levels in the forest
Collect 100 Coins in one Play session
Collect 20 gems in one play session
Watch the credits
Finish a level with 0 hits left
Get a highscore over 2500
Get every Achievement.