Here is the full list of all 19 Haven Park achievements.
Finish the campers' wishlist in one camp
Find and open 20 crates!
Spend a week in the park
Finish all the quests
Build a ferris wheel in one of the camps
Reach level 10
Find and fly with the hot air balloon!
Use the cannon in Old Castle and become rocketman!
Swim to the north-most part of the sea
Pew 200 times
Unlock all skills
Repair 50% of all broken things in the park
Play the guitar
Light 5 firefly lanterns
Collect coins from a food vendor
Trade resources at a marketplace
Jump on a swing
Find Dr. Wolf's practice
Climb the bow of the shipwreck