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