Here is the full list of all 24 Smile For Me achievements. It takes around 5-6 hours to unlock all of the achievements on Windows.
Find the Duck’s true owner
No thank you ma’am
Help a friend in need
Forgive and forget.
Leave unfinished business at the Habitat
Escape the Habitat
Some crimes can’t be forgiven.
Satisfy every habitician
You really went and did it, huh?
Accept a smooch
Clean Kamal's teeth
Find every diary page
Satisfy 15 habiticians
Grip a Y’owl for Borbra
Dispose of the Duck
Unlock the Terrace
Get a very high score at Whack-a-Molar
Discover a hidden sweetheart
The secret’s out...
Find an alternative route
Unlock the Lounge
Unlock the Carnival
Hit Ronbo with a golf ball
Satisfy a Habitician