I agree with much of the above - it's a beautiful start to the theme.
Definitely print it actual size to get a feel; I agree the font is small. The est. 2015 may be unreadable because of the size, and depending on the chip printer, may simply be completely unreadable because of fine detail.
I do think you should keep the moon element; important to the theme - if you can't fit it well, consider two labels - tango dancers one side, the half moon on the obverse.
I also agree that the denom color lacks contrast, but I wouldn't agonize over that too much until you've got it mocked onto chip colors. You'll probably end up re-working it, anyway.