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