Here is the full list of all 38 Just Get Through achievements.
Complete an advanced level with only one hp left
Destroy a falling wall using your head
Try some new colorpalettes
From now on your life will be tough.
Reach level 12 without picking up any items
Find a colorpalette
So random
Don't crash the game!
Collect 20 damaged color palettes!
Reach level 15 without using TNT
Reach level 10 in classic mode without dying once
Beat a rocket bot at their own game
Reach level 50 in a classic game mode
Nope, there is none. At least not here...
Defuse a bear trap by throwing TNT at it
Trigger a mine by throwing TNT at it
Find the rare rainbow colorpalette
Reach level 40 in a classic run
Collect over 20 HP Items in one run
Publish an amazing custom level
Two hours of permanent dying
Destroy more than 500 walls in total
Play and win more than 10 different global custom levels
Activate 200 checkpoints
Waste 24 hours of your life
Reach level 30 in a classic run
Reach level 35 in a classic run
Reach level 45 in a classic run
This was not the exit
Complete every daily run of one week
I am hardcore
This was hardcore...
At least almost complete
Have over 1000 Coins in one Coin Run
Ouch...
Better be quick and use this flare for a few additonal pitch-black levels
Slowly and carefully walking to the exit
Ignite over 100 torches