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