Here is the full list of all 17 Supraland Demo achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Nom nom
Drive the plot forward
Found Armor
Not even once? Nothing is being cooked.
Found holy sword upgrade
Found Telefrag Upgrade
Reached top of the hill
Bought Triple Jump Upgrade
The first secret area in the game
Found a healthbar
Bought Double Jump Upgrade
Unlocked Speed x2
Bought a Force Cube
Got Health Regeneration Upgrade
Perfect 5/7 experience
Find out what they are up to
Made your first step