Here is the full list of all 30 Goblin and Coins II achievements.
Finished a level.
Solved the first puzzle.
Solved three puzzles.
Drop an icicle on someone's head. Preferably not yours.
Killed a floating head... Thing.
Came back from the dead.
Lost the game and ended up in the underground.
Finished 10 levels.
Did that cannonball hit a seagull?
Feed the crusher skull some grub.
Destroyed by a crusher skull.
Open a treasure chest.
Start a new game with an easy start option disabled.
Got an upgrade.
Obtained the double jump.
Drown a frog. I'm aware it doesn't work like that.
Drown all the frogs in the same level.
Collected all the coins in a single level.
Collected all the coins in 10 different levels.
Collected all the coins in 25 different levels.
Finished 25 levels.
Bounce off three things while airborne.
Finish the game without any upgrades.
Destroy a bullet by jumping on it.
Neither a borrower nor a lender be.
Visited a hidden level before it was cool.
Also, everywhere I look at the ground.
Finish a level with the last remaining life.
Don't touch me!
In a level with 10 or more enemies, leave none alive.