Here is the full list of all 15 Code Wizard: Java Edition achievements.
You completed the first lesson.
You completed your work on the farm.
You put the farm back in order.
You found a way out of the forest.
You helped the townsfolk and paid your debt.
You cleaned up the graveyard.
You managed to find your way out of the cave.
You worked your way through the jungle.
You passed the tests of the wizards.
You put all the interfaces back in place.
You made it through the secret path to the tower.
You made it to the top of the tower.
You repaired the damage done to the planet and defeated the wizard.
Well done! You've completed code wizard on the experienced difficulty!
Amazing! You've completed the game on the hardest difficulty!