Its not Jellyfish
Im enjoying the game quite a lot and dont have anything to nitpick about in particular. However, its obvious that the game is set up for beginners to low mid-level players.
As far as I can tell the "hard" level in the game is about a level 2 for Jellyfish out of about 10 levels. For those who are not familiar, Jellyfish is the benchmark learning and rating system for backgammon players world wide.
So, if I had a nitpick, it would be that there needs to be several more levels of difficulty so that as a player improves their game they could move to a more challenging level.
Moguin about
Backgammon HD, v4.4.2