Here is the full list of all 19 Lost in Play achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
You won a game of crab-checkers against the Seagul
You made it home!
You entered a dream and retrieved the crown while falling through space merged to your sibling, good job!
That was a nice usurpation!
You made a bone rubble out of the giant turtle, if only we could turn back time
You broke out of prison thanks to a chicken
You licked the night pot at the prison
You just made a baby cry, I hope you are proud of yourself
You exited the dragon cave (see, there is no Bruce Lee movie by that name)
A dream within a dream
You entered the dragon cave (not a reference to the Bruce Lee movie)
That's the second biggest cat I've ever seen
Complete the Jellyfish puzzle
Survived the ocean and sailed away
You snapped back into reality, or did you?
You won a game of fox and hounds against a forest critter and lived to tell the tale
When you become a moster, be careful not to fight one
You really like changing radio stations
But you're not the only one