Awesome script! The only issue I see is that there is a tiny stutter when an animation fully loops. You have to really be watching closely to see this problem. Is there a duplicated last frame or something? Can this issue be fixed in an update? Then this script would really be perfect!
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Sorry for the delay!
I think that I might have found this issue, was it happening only on up down or diagonals? Left and right was okay or was it also happening on left and right?
I just uploaded an update which fixed some stuttering issues hopefully this was the issue you had!
Let me know if it's still doing it after you update :D