Here is the full list of all 42 Scrap Garden achievements. It takes around 3-4 hours to unlock all of the achievements on Windows.
Eliminate 300 enemies
Find all holograms
Break 100 boxes
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Get bitten by piranhas
Find the card
Die in the shadows
Complete the game
Defeat the dragon
Find the green crystal
Get burned by the dragon
Get to the end of rails
Eliminate 100 enemies
Collect 1500 crystals
Defeat the toad
Get eaten by the toad
Find the pumpkin
Collect 1000 crystals
Defeat the octopus
Go down the hill
Find the snow globe
Break 50 boxes
Eliminate 50 enemies
Defeat the gorilla
Take a punch from the gorilla
Find the mp3 player
Collect 500 crystals
Defeat the worm
Let the worm toss you up in the air
Find the Rubik's cube
Find the alarm clock
Collect 300 crystals
Throw a ball into the basket
Eliminate 10 enemies
Find the camera
Break 5 policemen
Break 10 boxes
Visit a friend
Collect 100 crystals
Complete the arcade minigame
Get back the generator
Start playing