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