How to play Energy Types Puzzle.
There are 20 sources of potential and kinetic energy, which will appear randomly on the upper part of the screen. Below, there are the drop panels for the two main forms of energy - potential and kinetic.
Drag and drop the sources pictures over the appropriate type of energy.
Upon completion, new Knowledge Level is achieved.
Know the two main forms of energy.
Winning the game rewards +1 Knowledge Level
The download version(bottom of the page) include an executable file for Windows OS with local levels only.
Here is a gameplay movie on YouTube.