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