Here is the full list of all 12 Element4l trophies - there are 8 bronze, 3 silver and 1 gold.
Finish a level with less than 30 actions
Finish Element4l
Finish "Willpower" stages
Finish a level in less than 60 seconds
Achieve a gold medal in any level
Finish "Mind" stages
Beat Mr. Smooth in any level
Finish "Heart" stages
The game begins...
Find all lost sparks
Finish the rollercoaster level in less than 60 seconds
Beat the dev in any level