When I say this reminds me of those games I used to play on flash portal sites, I mean it in the best way possible. There's an entire game experience crafted here, a tutorial to get me into the game, a series of missions for a bit of directed play, but also plenty of room for sandbox play, and just overall game systems that have time wasting potential due to how much fun they are. A memorable moment I had was when I crashed into another chariot, and the inertia of that chariot ended up running over a bystander - oops!
I have little nit picks like with the chariot controls and the size of some roads of the settlement you're riding through, but otherwise it's great. I had a good time!