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