I really enjoyed clearing this I liked the vector game loop and that elements you found let you manipulate things differently. The art is nice digging the pixel art. Sounds were also good though the sound engine eventually crashes. Nothing that a restart doesn't fix though, since there are frequent save points.
I'd love to see some caching of the last spent gems, or being able to assign a gem combination each of the gems in the elements view. And I understand that some multitasking would probably be implemented, that would help with the energy management, which right now interrupts the explorative flow. Talking of which I think some better feedback for close hits to colliding for elements would be cool. An "Efficiency" or "Accuracy" number that pops up which tells you how close you were to the nearest element.
All in all a great experience and a pretty good minigame to have somewhere.