I've read a lot - a LOT - of rpgs in the last 30+ years. I'm amazed that people keep finding ways to surprise me, to do something new, to reinvent something familiar. I guess thats what art does, and for me, games are art. Numa a accomplishes this.
I used to really love ornate, complex games. Now that time is at a premium, I appreciate the simplicity and design of games like Whitehack, the Black Hack, ICRPG, Into the Odd and Mork Borg, with Godbound at the edge of the level of crunch I prefer. I say this because to play this game as written you'll need to learn a new system. Its not as far from classic OSR as Fate or Tribe 8, but far enough that it'll take a little effort.
Its worth it. And even if you'd rather not, the material is good enough to layer over whatever system you like. With more pages you'd have something that could rival Mouse Guard. Anthropomorphic animals is nothing new, even anthropomorphic samurai have been done. But something in this feels original and vibrant. The design elements are strong - not Mork Borg strong, but authentic, clean and imaginative.
The game play feels high stakes. There are enough modular pieces to keep players engaged, and you could run a straight samurai game out of here with minimal changes. The frogs are easy to care about, in part because they're different from us so they don't feel cuddly or cliche.
This isn't a game for everyone. I could definitely see how you might read this and not play it, and I still think you'd be glad you read it. If I only had $12 and could only get one game, I'd get more mileage out of Whitehack or ICRPG. If you want to read something fun and play something different, this could definitely be that game. There are plenty of games out there, and plenty of OSR games. This game has earned a place on my shelf.