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