Nice and unique puzzle-game. It's difficult to find new ways to present a puzzle and this is done well here. The music, though repetitive, is nice and suitable. The only think I would change is the way you interact with the puzzle. The click-and-drag makes it feel a little clunky. Clicking on the lower bar to select one and then clicking on the field to drop it would be an other option. Other than that, well done!
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