It's a great looking environment and nice models (got hungry and need some candy now^^) and cool sound effects.
Unfortunately the gameplay somehow seems to be a bit bugged. Tried it a few times now, when i come close to the scale it disappears. Then can drag around the boxes and the candies. Good job with marking, which candy belongs to which position and snap it then also correctly there.
But unfortunately when i've placed them all, nothing happens. All i did at the end then was just jumping from the platform, lol.
But checked out your video also, and i think if it would work like that, it would be pretty nice and kind of entertaining educational. So, all in all a cool concept.