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