Here is the full list of all 13 Pan-Pan achievements.
Beat the game.
Collect 100 fuel seeds.
Smack a lot of stuff with the stick.
Find the old crashed ship.
Hello world. Greet all creatures.
Visit most of the places in the world.
Collect 10 fuel seeds.
Travel 10000 meter in the world.
Collect 1 fuel seed.
Deliver a piece to the broken ship.
Steal an egg.
Find the battery part needed to fix your broken ship.
Let the stick do the talking. Smack all creatures with the stick.