Very nice. I like the simple classic look.
One comment though. On the larger mockups, everything looks fine but on the smaller mockups, the right turtle leg/flipper seems to compete with the denom on some of the chips. This may not be an issue when its on the real chips but it did stand out to me. A couple idea would be to make the turtle/denom smaller so they don't mix or maybe lighten the black turtle somewhat.
On a serious note, its nice to see someone do a memorial chip for the now extinct Minnesota Seat turtle, great job.
