Here is the full list of all 13 Pan-Pan achievements.
Collect 10 fuel seeds.
Collect 1 fuel seed.
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.
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.
Smack a lot of stuff with the stick.
Find the old crashed ship.
Beat the game.