Hmm, just tried it out and I see the squares where the dice should go while circling, but the dice didn't show up after releasing. Must be a bug after all.
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I think I found the problem. You have to draw the circles clockwise . If you draw them counter-clockwise in version 1.0.3 it breaks the dice. If you're using the original version then it won't break the dice, it just won't roll them. Thanks for all the feedback :) I put out a new version to fix this.