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