Really great looking art. The mechanic where you make a specific part go to a different time is quite nice.
The ending though, I believe there should have been something to indicate that was the end (like a big text fading in saying THE END and a bit of story telling what the end was about), and have the crystals HUD disappear. I mean it is of course obvious that it is the end, but in the beginning I thought it was a transition to a new level, until I realized nothing else happened :-)
Fantastic work though! Short but great :-)