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.
Perfect 5/7 experience
The first secret area in the game
Find out what they are up to
Unlocked Speed x2
Got Health Regeneration Upgrade
Found a healthbar
Bought a Force Cube
Bought Double Jump Upgrade
Bought Triple Jump Upgrade
Reached top of the hill
Found Telefrag Upgrade
Found Armor
Drive the plot forward
Not even once? Nothing is being cooked.
Found holy sword upgrade
Made your first step
Nom nom