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